M4maths Previous Puzzles

31 Dec 2014 Time and Work

If the work done by (x-1) men in (x+1) days is to the work done by (x+2) men in (x-1) days are in the ratio 9:10, then x is equal to:

OPtion

1) 4
2) 5
3) 6
4) 7
5) 8
6) 9
7) 10
8) 11
9) 12
10)None of these

Solution

Let the work by (x-1) men in (x+1) days = 9z
Then, work done by 1 man in 1 days = [9z/(x-1) * 1/(x+1)]
Let the work done by (x+2) men in (x-1) days = 10z
Therefore Work done by 1 man in 1 days = 10z/(x+2)(x-1)
Therefore
9z/(x-1)(x+1) = 10z/(x+2)(x-1)
Solve
x=8
Option 5)

Correct Option: 5 Best Solution (51)

Surit Datta   10 years AGO

According to the question
{ (x-1)(x+1) / (x-1)(x+2) }= 9/10
=> (x+1)/(x+2) = 9/10
=> x = 8
So option 5
That's it.

Like? Yes (13) | No (6)  

Akhil Malhotra   10 years AGO

(x-1)(x+1):(x+2)(x-1)=9:10
cross multiply them
10x^2-10=9x^2+9x-18
simplifying
x^2-9x+8=0
solving it, we get
(x+1)(x-8)=0
so the answer is 8 i.e. option 5

Like? Yes (10) | No (3)  

susanta   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x=8

Like? Yes (5) | No   

vaishnavi   10 years AGO

10(x-1)(x+1)=9(x+2)(x-1)
x=8

Like? Yes (5) | No   

Sundar Kumar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8
Answer: Option 5) 8

Like? Yes (7) | No (3)  

anupriya sinha   10 years AGO

(x+1)(x-1) / (x+2)(x-1) = 9/10
=> x = 1 ,8

Like? Yes (5) | No (1)  

RAKESH   10 years AGO

(x-1)(x+1) / (x+2)(x-1) = 9/10
=> (x+1)/(x+2) = 9/10 [x not equal to 1]
=> x = 8

Like? Yes (4) | No (1)  

Rahul   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (4) | No (2)  

Shreya Banerjee   10 years AGO

8 is correct answer
sol:(x-1)(x+1)/(x+2)(x-1)=9/10
then from above eq:(x+1)/(x+2)=9/10
by observing eq:we can say that..

x=8

Option 5.

Like? Yes (4) | No (2)  

Mithun Kumar Kesari   10 years AGO

8

Like? Yes (2) | No   

A.Vignesh Guru   10 years AGO

9:10 = (x-1)(x+1) : (x+2)(x-1)
((x+1)/(x+2)) = 9/10
10x + 10 =9x + 18
x=8

Like? Yes (3) | No (1)  

JUHI RAI   10 years AGO

M1D1=M2D2
(x-1)(x+1)=(x+2)(x-1)
(x+1)/(x+2)=9/10
10x+10=9x+18
x=8

Like? Yes (2) | No   

THUMMALA VINEESHA   10 years AGO

[(x-1)(x+1)/(x+2)(x-1)]=[9/10]
x=1,8
x does not exists so, x=8

Like? Yes (3) | No (1)  

Suyash Kunawat    10 years AGO

(x-1)(x+1) = x^2-1
and (x+2)(x-1) = x^2+x-2
if their ratio is equal to 9/10 then the equation reduces to
(x^2-1)/(x^2+x-2) =9/10
on solving further we get
x^2-9x+8=0
x^2-8x-x+8=0
x(x-8)-1(x-8)=0
(x-8)(x-1)=0
so possible values of x are 8 and 1
so fropm the supplied options we have option no 5 i.e. 8 as the correct option

Like? Yes (3) | No (1)  

niraj   10 years AGO

x+1/x+2=9/10
10x+10=9x+18
8

Like? Yes (3) | No (1)  

pallavi kumbhar   10 years AGO

total work done by (x-1)= (x-1)(x+1)
total work done by (x+2)= (x+2)(x-1)
so,
[(x-1)(x+1)]/[(x+2)(x-1)]=9:10
by solving it we get
x=8

Like? Yes (2) | No   

shree   10 years AGO

x=8

Like? Yes (2) | No   

Ramesh Sriram   10 years AGO

(X-1)(x+1)/(x+2)(x-1)=9/10
Solving
X=8

Like? Yes (2) | No   

Jigyasa Kumar   10 years AGO

solving the eqn x = 8

Like? Yes (2) | No   

Moti Kumari   10 years AGO

10/9=((x-1)(x+1)) / ((x+2)(x-1) )
(x+1)/(x+2) =10/9
x=8

Like? Yes (2) | No   

vivek   10 years AGO

x=8

Like? Yes (2) | No   

A M ANKIT KALLURAYA   10 years AGO

x+1/x+2=9/10

Like? Yes (2) | No   

Jaspalsingh Parmar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (3) | No (2)  

Supriya Mondal   10 years AGO

From the above question we can write,
((x-1)*(x+1))/((x+2)*(x-1))=9/10
so x=8
so option 5)8 is the right answer

Like? Yes (5) | No (4)  

sravani   10 years AGO

given
(x-1)(x+1) 9
__________ = ____
(x+2)(x-1) 10

we get
x^2 - 9x + 8=0
x=8 or 1
x can't be 1 as eq will become 0/0(undefined)
so x=8

Like? Yes (2) | No (1)  

llamar   10 years AGO

((x+1)(x-1))/((x+2)(x-1))=9/10
by solving above expression you will get the ans i.e. x=8

Like? Yes (3) | No (2)  

Abhishek Porwal   10 years AGO

=>(x-1)(x+1)/(x+2)(x-1) =9/10
=>10x + 10 = 9x + 18
=>x=8

Like? Yes (3) | No (2)  

madhusudhanreddy   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8 ANS

Like? Yes (1) | No   

Jay parmar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (3) | No (2)  

lavanya   10 years AGO

x-2/x-1=9/10
10x-20=9x-9
x=11

Like? Yes (3) | No (2)  

MRITUNJAY   10 years AGO

X+1/x+2=9/10
x=8.

Like? Yes (3) | No (2)  

NITHYA   10 years AGO

by inverse variation ,

(x+1)*(x-1)/(x-1)*(x+2)=9/10

on solving we get x= 8

Like? Yes (2) | No (1)  

vikram   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
on solving we get x = 8.

Like? Yes (3) | No (2)  

Ashwin Dinesh   10 years AGO

guessed

Like? Yes (1) | No   

Aarti Galar   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (1) | No   

Tark Patel   10 years AGO

(x-1)(x+1)/(x-1)(x+2)=9/10
=>(x+1)/(x+2)=9/10
=>x=8

Like? Yes (1) | No   

varun Galar   10 years AGO

man work in 1st case=(x-1)(x+1)
man work in 2nd case=(x+2)(x-1)
(x-1)(x+1)/(x+2)(x-1)=9/10
x+1/x+2=9/10
10x+10=9x+18
x=8

Like? Yes (1) | No   

Faisal JAffry   10 years AGO

(X-1) * (X +1) men can finish the work in 1 day
Similarly,
(X+2)(X-1) men can finish the work in 1 day
Therefore,
(X-1) * (X +1)/(X+2)(X-1)=9/10;
10(X+1)=9(X+2);
X=8;

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

(x-1)*(x+1)/(x-1)*(x+2)=9/10
so,9x+18=10x+10
hence x=8 ans
so. optn 5 is correct

Like? Yes (1) | No   

Devendra Marghade   10 years AGO

[(x-1)(x+1)] / [(x+2)(x-1)] =9/10
10(x^2+x-x-1) = 9(x^2-x+2x-2)
x^2-9x+8=0
(x-1)(x-8)=0, So x=8

Like? Yes (1) | No   

guru   10 years AGO

(x-1)(x+1) : (x+2)(x-1) = 9 : 10

x+1 : x+2 = 9:10
10x+10= 9x+18
x=8

Like? Yes (1) | No   

utkarsh bisht   10 years AGO

total work done by x-1 = (x-1)(x+1)
total work done by (x+2)= (x+2) (x-1)
as they are in ratio so, (x-1)(x+1)/(x+2) (x-1)=9/10
hence x=8

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

(x+2)*(x-1)/(x+1)*(x-1) = 10/9
=> x+2/x+1 = 10/9
=> x=8. Ans.

Like? Yes (1) | No   

pappu kumar priye   10 years AGO

(x+1)*(x-1)/(x+2)*(x-1)=(x+2/(x-1)=9/10 so x=8

Like? Yes (1) | No   

abhishek   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x^2-9x+8=0
x=8

Like? Yes (1) | No   

Priya Dharshini   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10

==>(x+1)/(x+2)=9/10;
x=8 ans;

Like? Yes (1) | No   

payal vyas   10 years AGO

(x-1)(x+1)/(x+2)(x-1)=9/10
x^2-1/x^2+x-2=9/10

10x^2-10=9x^2+9x-18

x^2=9x-8

x^2-9x+8=0

x^2-8x-x+8=0

x(x-8)-1(x-8)=0
(x-8)(x-1)=0
x=8,1
if x=1
then equation (0-1)(0+1)/(0+2)(0-1)=9/10
so value of x=8 option(5)

Like? Yes (1) | No   

Banti   10 years AGO

((x-1)(x+1))/((x+2)(x-1))
x-1 will get cancel in numerator and denominator.then
(x+1)/(x+2) will be resultant. from the options substitute 8, answer will be 9:10 ratio.

Like? Yes (1) | No   

khushboo goenka   10 years AGO

x^2-1/x^2+x-2=10/9

Like? Yes (1) | No   

Sanu Panji   10 years AGO

(x-1)(x+1) : (x+2)(x-1) = 9 : 10
or, x= 8

Like? Yes (1) | No   

Dr.Dipin Singh   10 years AGO

[(x-1) * (x+1)] / [(x+2) * (x-1)] =9/10
solving, we get
x=8

Like? Yes (1) | No   

30 Dec 2014 Ratio and proportion

What is the ratio whose terms differ by 40 and the measure of which is 2/7.

OPtion

1) 16:56
2) 1:3
3) 14:56
4) 9:10
5) 15:56
6) 15:16
7) 16:72
8) 3:5
9) 2:7
10)None of these

Solution

let the ratio x:(x+40)
Then, x/(x+40) = 2/7
7x = 2x + 80
x = 16
Required ratio is 16:56

Option 1)

Correct Option: 1 Best Solution (38)

venkatesh.p   10 years AGO

let one term be x
and other term be y . they differ by 40
so y = x+ 40

x/y = 2/ 7
x/x+40= 2/7
7x = 2x+ 80
5x = 80
x= 16
x= 16
y= 56
ratio = 16: 56.

Like? Yes (16) | No (5)  

Ashwin Dinesh   10 years AGO

that was simple!

Like? Yes (8) | No (3)  

ranjithreddy   10 years AGO

7x-2x=40
5x=40
x=8
the ratio is 16:56

Like? Yes (10) | No (5)  

lavanya   10 years AGO

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (5) | No (3)  

Sundar Kumar   10 years AGO

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16:56

Like? Yes (4) | No (3)  

Vishnu   10 years AGO

If the terms differ by 40 they are of the form n and (n+40).
So n/(n+40)=2/7 giving
7n=2(n+40) giving
7n=2n+80 giving
5n=80 giving
n=16 so the required ratio is
16:56

Like? Yes (2) | No (1)  

NITHYA   10 years AGO

terms differ by 40 (56-16) and the ratio is 15/56=2/7

Like? Yes (1) | No   

Chithra   10 years AGO

7x-2x=40, x=8
2x=16, 7x=56

Like? Yes (1) | No   

priti sagar   10 years AGO

x/x+40=2/7
=>x=16
x/x+40=16/56

Like? Yes (2) | No (1)  

sanjeev kumar   10 years AGO

Ans is 1

Like? Yes (2) | No (1)  

Akhil Malhotra   10 years AGO

using hit and trial method we can see that in option 1 the difference between the terms is 40 and their measure is also 2/7.

Like? Yes (2) | No (1)  

jyothik vishnu   10 years AGO

x and y=40
y-x=40
2/7=x/y
7x=2y
y=7x/2
then substitute this y in y-x=40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (1) | No   

C A KRISHNAN   10 years AGO

56-16=40
16:56=2:7

Like? Yes (1) | No   

Tark Patel   10 years AGO

If the terms differ by 40 they are of the form n and (n+40).
So n/(n+40)=2/7 giving
7n=2(n+40) giving
7n=2n+80 giving
5n=80 giving
n=16 so the required ratio is
16:56

Like? Yes (2) | No (1)  

MRITUNJAY KUMAR   10 years AGO

Options1)

Like? Yes (1) | No   

Yuvaraju D   10 years AGO

x-y=40.............(1)
x/y=2/7
7x=2y then substitute x=(2/7)*y
we get y=56 and x=16
x:y=16:56

Like? Yes (1) | No   

Ajinkya Kulkarni   10 years AGO

56-16=40
16/56=2/7

Like? Yes (1) | No   

Suyash Kunawat    10 years AGO

since the terms are 16 and 56 so the difference between them is 40 and on taking the ratio of both the terms we get 2/7. hence option 1 is the corrrect andwer

Like? Yes (1) | No   

KOLLA PHANI TEJASWINI   10 years AGO

56-16=40 n 16/56=2/7

Like? Yes (1) | No   

Narendra   10 years AGO

Let the fraction be x/y.

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (1) | No   

Aarti Galar   10 years AGO

Let the fraction be x/y.

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (1) | No   

Pradeep Singh   10 years AGO

first term is x and second term is x+40,
so x /(x+40)=2/7

so x=16

so ratio is: 16/56

Like? Yes (1) | No   

JUHI RAI   10 years AGO

from the option
16~56=40
16/56=2/7
so ans.16:56

Like? Yes (1) | No   

Pratyay Das   10 years AGO

x/x+40=2/7
i.e 7x=2x+80
i.e 5x=80
hence x=16
x+40=56
16:56

Like? Yes (1) | No   

guru   10 years AGO

Let the numbers be 2x and 7x whose difference is 40.
7x-2x=40
5x=40
x=8
2x=16, 7x=56
So the the ratio is 16:56

Like? Yes (1) | No   

swarupa nuggu   10 years AGO

16:56

Like? Yes (1) | No   

payal vyas   10 years AGO

let a-b=40
40+b/b=7/2
80+2b=7b
so b=16 and a=56 ratio= 16:56

Like? Yes (1) | No   

madhavi reguri   10 years AGO

16 is 40 less than 56 and its ratio is 2/7

Like? Yes (1) | No   

Sravanthi   10 years AGO

a/b=2/7
b-a=40
solving above eq
a=16
b=56

Like? Yes (3) | No (3)  

Surit Datta   10 years AGO

y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56
option 1
That's it.

Like? Yes (4) | No (4)  

RAKESH   10 years AGO

56-16 = 40 & 16/56 = 2/7

Like? Yes (1) | No (1)  

vikram   10 years AGO

7x-2x=40
5x= 40
x=8
2x/7x= 16/56

Like? Yes (2) | No (2)  

K.ARun   10 years AGO

If the terms differ by 40 they are of the form n and (n+40).
So n/(n+40)=2/7
7n=2(n+40)
7n=2n+80
5n=80
n=16
16:56

Like? Yes (1) | No (1)  

Supriya Mondal   10 years AGO

let the 1st number(small) is x and second number(big) is y
then we can write y-x=40...................(i)
and x/y=2/7......................(ii)
so, 2y=7x
Now multiply equation (i) by 2
so 2y-2x=80
now 7x-2x=80 (as 2y=7x)
so, 5x=80
x=16
as we know that y-x=40
so, y=x+40
=16+40
=56
so option 1)16:56 is the correct answer

Like? Yes (2) | No (2)  

Jaspalsingh Parmar   10 years AGO

Let the fraction be x/y.

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (3) | No (3)  

khushboo goenka   10 years AGO

56-16=40
16/56=2/7

Like? Yes (1) | No (1)  

Jay parmar   10 years AGO

Let the fraction be x/y.

Difference between x and y = 40 I.e.
y - x = 40 ............. (1)
x/y = 2/7
Cross multiply;
7x = 2y
7x / 2 = y ............... (2)
Substitute for y in (1);
y - x = 40
(7x/2) - x = 40
Take 2 as lcm;
[7x - 2x] / 2 = 40
5x/2 = 40
Cross multiply;
5x = 2 * 40 = 80
5x = 80
x = 80/5 = 16
x = 16.

7x/2 = y
7(16) / 2 = y
7(8) = y
y = 56.

The fraction is;
16/56

Like? Yes (1) | No (1)  

shree   10 years AGO

x/(x+40) =2/7
x=16
ratio is 16/56

Like? Yes (1) | No (1)  

29 Dec 2014 Sequence

What is the next number of the following sequence.
4, 48, 384, 2560, ......

OPtion

1) 15390
2) 18530
3) 15300
4) 18076
5) 15050
6) 16750
7) 17360
8) 15860
9) 15360
10)15450

Solution

1*4 = 4
(1+2)*4^2 = 3*16 = 48
(1+2+3)*4^3 = 6*64 = 384
(1+2+3+4)*4^4 = 10*256 = 2560
Similarly
(1+2+3+4+5)*4^5 = 15*1024 = 15360

Option 9)

Correct Option: 9 Best Solution (23)

~Sandeep~   10 years AGO

nth term = 4^n * (n(n+1)/2)
5th Term = 4^5*(5*6/2) = 4^5*15 = 15360

Like? Yes (9) | No (3)  

Surit Datta   10 years AGO

The series is like :-
4^1 * 1 = 4
4^2 * 3 = 48
4^3 * 6 = 384
4^4 * 10 = 2560
4^5 * 15 = 15360
So option 9
That's it.

Like? Yes (11) | No (5)  

Ashwin Dinesh   10 years AGO

[m*sqrt(n)]^2
where m = 2, 4, 8, 16, 32 i.e. next m = 2m
and n = 1, 3, 6, 10, 15 i.e next n = n+1
so [32*sqrt(15)]^2 = 15360
which is option 9)

Like? Yes (2) | No   

Supriya Mondal   10 years AGO

We can write,
1st number as 4^1*1
2nd number as 4^2*3
3rd number as 4^3*6
4th number as 4^4*10
so 5th number will be 4^5*15=15360
As power of 4 increased by 1 and multiplication number increased like at first 1 then 2 then 3 and so on.
So option 9)15360 is the right answer

Like? Yes (2) | No   

NITHYA   10 years AGO

4^1, 4^2*3,4^3*2,4^4*10,4^5*15.....

Like? Yes (2) | No   

lavanya   10 years AGO

4, 48, 384, 2560,
4^0*1,4*4^1*3,4*4^2*6,4*4^3*10,4*4^4*10
diff between no 1,3,6 10,15 is 2,3,4,5,...
so answer is 15360

Like? Yes (2) | No   

MRITUNJAY   10 years AGO

2^2*1=4
2^4*3=48
2^6*6=384
2^8*10=2560
2^10*15=15360

Like? Yes (2) | No   

sravani   10 years AGO

4* (4^2 * 3) = 48
4* (4^3 *6) =384
4* (4^4 *10) =2560
4* (4^5 *15) =15360

Like? Yes (2) | No (1)  

bikash samanta   10 years AGO

2560×6=15360

Like? Yes (1) | No   

Preethi   10 years AGO

1*2^2 , 3*2^4 , 6*2^6 , 10*2^8 Is the given sequence where 1,3,6,10 are 1,1+2,1+2+3,1+2+3+4
so next is 15*2^10=15360

Like? Yes (1) | No   

Sanu Panji   10 years AGO

(4^1)*1= 4
(4^2)*3= 48
(4^3)*6=384
(4^4)*10=2560
(4^5)*15= 15360

Like? Yes (1) | No   

guru   10 years AGO

4=1x2^2

48=3x2^4

384=6x2^6

2560=10x2^8

So the next number is 15x2^10=15x1024=15360

Like? Yes (1) | No   

BODHU NISHITHA   10 years AGO

4x1=4,4^2*3=48,4^3*6=384,4^4*10=2560,4^5*15=15360

Like? Yes (1) | No   

sanjeev kumar   10 years AGO

Ans 9

Like? Yes (1) | No   

Sravanthi   10 years AGO

4
4^2*3
4^3*6
4^4*10
4^5*15=15360

Like? Yes (1) | No   

payal vyas   10 years AGO

1)4=4X1
2)48=4X4X3
3)384=4x4x4x6
4)2560=4x4x4x4x10
5)4x4x4x4x4x15=15360
as for next no power of 4 is incresed 1 and ending no. series 1,3,6,10,15

Like? Yes (1) | No   

llamar   10 years AGO

4=(2^2)*1
48=(2^4)*3
384=(2^6)*6
2560=(2^8)*10
?? =(2^10)*15
----->1024*15=15360
(the multiplier 1,3,6,10,15 follow the following rule
i.e. the difference b/w consecutive term increases by 1 every time 3-1=2, 6-3=3, 10-6=4, 15-10=5)

Like? Yes (1) | No   

Chandra chur anand   10 years AGO

4^2*3=48
4^3*6=384
4^4*10=2560
4^5*15=15360

Like? Yes (1) | No   

Yuvaraju D   10 years AGO

4*1*1=4
4^2*1*3=48
4^3*2*3=384
4^4*2*5=2560
4^5*3*5=15360

Like? Yes (1) | No   

Devendra Marghade   10 years AGO

Series is (4^1*1), (4^2*3), (4^3*6), (4^4*10), (4^5*15=15360)

Like? Yes (1) | No   

tejaswi vadali   10 years AGO

4=2*2*1
48=4*4*3
384=8*8*6
2560=16*16*10
therefore next sequence should be 32*32*15 because every number is twice its previous number multiple which comes twice.
and the last digits are 1,3(1+2),6(3+3),10(6+4),15(10+5)

Like? Yes (1) | No   

venkatesh.p   10 years AGO

Answer:.
The series is like :-
4^1 * 1 = 4
4^2 * 3 = 48
4^3 * 6 = 384
4^4 * 10 = 2560
4^5 * 15 = 15360

Like? Yes (1) | No   

Jigyasa Kumar   10 years AGO

4^5* 15 = 15360

Like? Yes (1) | No   

26 Dec 2014 Profit and Loss

A discount series of 10%, 20% and 40% is equivalent to a single discount of

OPtion

1) 50%
2) 30.56%
3) 60%
4) 70.28%
5) 55%
6) 40.8%
7) 65%
8) 56.8%
9) 35.6%
10)None of these

Solution

Let original price = Rs.100
Final price = 90% of (80% of 60% of 100)
= 90/100 * 80/100 * 60/100 * 100 = 43.20
Single discount = (100-43.20)% = 56.8 %

Option 8)

Correct Option: 8 Best Solution (29)

Sravanthi   10 years AGO

Let the initial price = 100
10% discount = 100*10/100 = 10
Remaining amount = 100 - 10 = 90
20% discount = 90*20/100 = 18
Remaining amount = 90 - 18 = 72
40% discount = 72*40/100 = 28.8
Total discount = 10+18+28.8 = 56.8
Since the initial price is assumed as 100, the single equivalent discount = 56.8%

Like? Yes (91) | No (20)  

Ramesh Sriram   10 years AGO

.9*.8*.6
1-.432
=56.8

Like? Yes (54) | No (14)  

jayalakshmi   10 years AGO

If 2 succesive discounts a% and b%
then net discount = a + b – (ab/100)

If 3 succesive discounts a%, b% and c%
then single discount
= a + b + c – (ab/100 + bc/100 + ca/100 – abc/10000)
In this case,
single discount
= 10 + 20 + 40 – (200/100 + 800/100 + 400/100 – 8000/10000)
= 70 – (14 – 0.8)
= 56.8 %

Like? Yes (35) | No (4)  

Sundar Kumar   10 years AGO

Let the initial price = 100
10% discount = 100*10/100 = 10
Remaining amount = 100 - 10 = 90
20% discount = 90*20/100 = 18
Remaining amount = 90 - 18 = 72
40% discount = 72*40/100 = 28.8
Total discount = 10+18+28.8 = 56.8
Since the initial price is assumed as 100, the single equivalent discount = 56.8%

Like? Yes (27) | No (10)  

SONU GUPTA   10 years AGO

10+20-10*20/100=28%
28+40-28*40/100=56.8%

Like? Yes (23) | No (7)  

MRITUNJAY   10 years AGO

find with formula
a+b-a*b/100
take two and find eduivalent
20+40-800/100=52
52+10-520/100=56.8

Like? Yes (23) | No (10)  

Pradeep   10 years AGO

If 2 succesive discounts a% and b%
then net discount = a + b – (ab/100)

If 3 succesive discounts a%, b% and c%
then single discount
= a + b + c – (ab/100 + bc/100 + ca/100 – abc/10000)
In this case,
single discount
= 10 + 20 + 40 – (200/100 + 800/100 + 400/100 – 8000/10000)
= 70 – (14 – 0.8)
= 56.8 %

(or )

its 56.8% off

Say something cost $10

10% off so now its $9.00
20% off of $9.00 becomes $7.20
40% off of $7.20 becomes $4.32

So the price is now $4.32 which is 43.2% of the original price, which means the total markdown is 56.8%

Like? Yes (8) | No (1)  

sasidhar   10 years AGO

let us take the c.p of the article be 100. then after giving the consecutive discounts of 10%,20%,40%. the s.p becomes 43.20. hence the overall discount obtained will be 56.8%

Like? Yes (11) | No (5)  

Yekollu Muneeswar   10 years AGO

Let suppose there is 100 rs

10% discount means (100*10)/100=10 => rs 90
20% discount means (90*20)/100=18 => rs 72
40% discount means (72*40)/100=28.8 => rs 43.20
So totally we are getting rs (100-43.20)=rs 56.8% of discount

option 8) 56.8%

Like? Yes (9) | No (4)  

merva.gayathri   10 years AGO

take 100
10% = 90
20% of 90 = 72
40% of 72 = 28.8
72-28.8 = 43.2%
equivalent discount 100-43.2 = 56.8%

Like? Yes (7) | No (4)  

Surit Datta   10 years AGO

Say something cost Rs. 10

10% off so now its Rs. 9.00
20% off of Rs. 9.00 becomes Rs. 7.20
40% off of Rs. 7.20 becomes Rs. 4.32

So the price is now Rs. 4.32 which is 43.2% of the original price, which means the total markdown is 56.8%
That's it.
Option 8.

Like? Yes (3) | No (2)  

Abhishek Porwal   10 years AGO

Let the initial price = 100
10% discount = 100*10/100 = 10
Remaining amount = 100 - 10 = 90
20% discount = 90*20/100 = 18
Remaining amount = 90 - 18 = 72
40% discount = 72*40/100 = 28.8
Total discount = 10+18+28.8 = 56.8
Since the initial price is assumed as
100, the single equivalent discount =
56.8%

Like? Yes (2) | No (1)  

llamar   10 years AGO

take initial value 100/-
10% discount--90/-
20% discount--90-18=78/-
40% discount--78-28.8=43.2/-
so the final selling price is 43.2/-
it will get by giving 56.8% in the initial value(i.e. 100/-)

Like? Yes (2) | No (1)  

naveen   10 years AGO

(100-100*10%)=90...(90-90*20%)=72...(72-72*40%)=43.20..discount=(100-43.20)

Like? Yes (2) | No (1)  

sravani   10 years AGO

90/100 * 80/100 *60/100 =43.2/100 = 56.8% discount of the original....

Like? Yes (7) | No (7)  

lakshmi   10 years AGO

Net SP = [100-40%] of [100-20%] of [100-10%] of Rs.100
= 60% of 80% of 90% of Rs.100
= 60/100 * 80/100 * 90/100 * 100
= 43.2
Required discount = 100 - 43.2 = 56.8

Like? Yes (2) | No (2)  

vikram   10 years AGO

a discount series of 10%, 20% and 40% is equivalent to a single discount of 56.8%

Like? Yes (1) | No (1)  

Md.Sultan Khichi   10 years AGO

Let the price is 100.
40%*100=40
20%*60=12
10%*(60-12)=4.8
48-4.8=43.2
100-43.2=56.8
Ans 56.8%

Like? Yes (2) | No (2)  

bhagya   10 years AGO

.9x (whats left over after a 10% discount)
.72x (80% of that)
.432x(60% of that)

So you're paying 43.2% which is a 56.8% dscount

Like? Yes (3) | No (3)  

Mithun Kumar Kesari   10 years AGO

56.8

Like? Yes (1) | No (1)  

CHANDA VIJAYALAKSHMI   10 years AGO

The easiest way to think about this is to start with a price of $100.

10% off a $100 dress would leave $90.

20% off a $90 dress would leave $72.

40% off a $72 dress would leave $43.20.

Now, what discount off of a $100 dress would give you a price of $43.20?

56.8%

Like? Yes (1) | No (1)  

Devendra Marghade   10 years AGO

If original value=x, then
Discounted value=x*0.9*0.8*0.6=0.432x
So % of single discount=(x- 0.432x)*100=56.8

Like? Yes (1) | No (1)  

lavanya   10 years AGO

its 56.8% off

Say something cost $10

10% off so now its $9.00
20% off of $9.00 becomes $7.20
40% off of $7.20 becomes $4.32

So the price is now $4.32 which is 43.2% of the original price, which means the total markdown is 56.8%

Like? Yes (2) | No (2)  

PAWAN KUMAR   10 years AGO

Let value before discount be Rs x.
The total amount after discount = x*0.9*0.8*0.6 = 0.432*x
Therefore, dicount = x-0.432*x = 0.568*x
So, discount% = 56.8%. Ans.

Like? Yes (2) | No (2)  

Supriya Mondal   10 years AGO

let price of the thing is Rs.100
then after giving 10% discount price will be Rs.90
then after giving 20% discount on it price will be Rs.72
then after giving 40% discount on it price will be Rs.43.2
So total discount is=(100-43.2)=Rs.56.8
So option 8)56.8% is the right answer

Like? Yes (3) | No (4)  

purushothama   10 years AGO

Net SP = [100-40%] of [100-20%] of [100-10%] of Rs.100
= 60% of 80% of 90% of Rs.100
= 60/100 * 80/100 * 90/100 * 100
= 43.2
Required discount = 100 - 43.2 = 56.8

Like? Yes (3) | No (4)  

Ashwin Dinesh   10 years AGO

10 + 18 + 28.8 = 56.8
which is option 8)

Like? Yes (2) | No (3)  

MRITUNJAY KUMAR   10 years AGO

Option)8

Like? Yes (2) | No (3)  

Vinay Sipani    10 years AGO

Consider for Rs 100

100 - 10% = 90
90 - 20% = 72
72 - 40% = 43.2

Toatal discount = 100 - 43.2 = 56.8%

Like? Yes (2) | No (5)  

25 Dec 2014 square

Four square corners are cut from a square paper of side length 10 cm. What will be the volume of the cubic tank formed.

OPtion

1) 1000 cm^3
2) 27 cm^3
3) 125/27 cm^3
4) 1000/27 cm^3
5) 216/27 cm^3
6) 125 cm^3
7) 64 cm^3
8) 8 cm^3
9) 1/8 cm^3
10) 216 cm^3

Solution

We should cut the square of dimension one third from the corner to make a cube, so volume = 1000/27 cm^3

Option 4)

Correct Option: 4 Best Solution (11)

Pradyumna K S   10 years AGO

If 10cm square is cut to form a cube then length of each side of the cube is 10/3 cm. Then volume is 1000/27 cc.therefore answer is option 4

Like? Yes (7) | No   

Ashwin Dinesh   10 years AGO

(10/3)^3 = 1000/27 cu. cm

Like? Yes (2) | No (1)  

PAWAN KUMAR   10 years AGO

To make the square, we should cut it at a length of 10/3 cm.
So, the side of the cube becomes 10/3 cm.
Volume = 10/3*10/3*10/3 cm^3 = 1000/27 cm^3. Ans.

Like? Yes (1) | No   

SIRISHA   10 years AGO

to make a cubic tank one must get a "+" structure with paper of equal sides..so we need to divide the 10cm into 3 parts both vertically and hoizontally...10/3 is the length of each side..volume of that cube is (10/3)^3=(1000/27)

Like? Yes (1) | No   

naveen   10 years AGO

we need to divide the 10cm into 3 parts both vertically and hoizontally...10/3 is the length of each side..volume of that cube is (10/3)^3=(1000/27)

Like? Yes (1) | No   

khushboo goenka   10 years AGO

when we cut four corners then length of each side is 10/3
so volume is 1000/27

Like? Yes (1) | No   

ASHISH MITTAL   10 years AGO

divide the 10 into three part so a become 10/3
an volume become 1000/27

Like? Yes (1) | No   

Rishabh Agarwal   10 years AGO

Since side of square is 10.So,area is 1000. and we have to form cube which is side*side*side.So,answer will be 1000/27

Like? Yes (1) | No   

guru   10 years AGO

We need to divide the side by 3, then we get 10/3. The square to be cut must have side 10/3 cm. The remaining paper can then be folded to form a tank and its side if of length 10/3 cm. So the volume of the tank is (10/3)^3= 1000/27 cm^3

Like? Yes (1) | No   

Devendra Marghade   10 years AGO

If side of a square sheet=x, then side of a cubic tank=x/3
So volume of a cubic tank=(x/3)^3= (10/3)^3=1000/27 cm^3

Like? Yes (1) | No (1)  

vikram   10 years AGO

the side of corner cut from square = 10/3 sq,cm
thus the cube formed is having a side of 10/3 sq.cm
volume of cube= a^3= (10/3)^3= 1000/27 cc

Like? Yes (1) | No (1)  

24 Dec 2014 Time and Work

Three tap together drain a complete tank in 5 hours. If first drains this tank in 10 hours alone, then minimum hours taken by second tap will be (in any condition)

OPtion

1) 10
2) 8
3) 4
4) 15
5) 20
6) 2
7) 1
8) 40
9) 5
10)25

Solution

Let time taken by first, second and third tap are t1, t2, t3
Then according to given condition
1/t1 + 1/t2 + 1/t3 = 1/5 (i)
and
1/t1 = 1/10
so
1/t2 + 1/t3 = 1/5 - 1/10 = 1/10
for t3 = Infinite
t2(min) = 10
Option 1)

Correct Option: 1 Best Solution (14)

kumari jyoti   10 years AGO

tap 1 will empty half of the tank alone in 5 hours.
if tap 3 is assumed to be of nil efficiency then tap 2 will also empty half of the tank in 5 hrs.
so, it will alone empty the tank in 10 hrs

Like? Yes (3) | No   

Vinay Sipani    10 years AGO

In 1 hour,three taps can drain 1/5 th of tank
=> (1/x) + (1/y) + (1/z) = 1/5

Given x = 10
=> (1/y) + (1/z) = 1/10
=> 10y + 10z = yz
=> z = 10y / (y - 10)

y is minimum => z is maximum
so, (y - 10) = 0 => y = 10 hrs

In other words, for z not to be negative,(y - 10) is to be positive
=> y - 10 = 0 => y = 10 hrs

Like? Yes (2) | No   

Md.Sultan Khichi   10 years AGO

They all drain the tanx in 5 hrs.
First tab alone drain it in 10 hrs.
Second tab minimum time =[1/5-1/10]=1/10
Ans. Ob 1

Like? Yes (1) | No   

Ashwin Dinesh   10 years AGO

guessed!

Like? Yes (1) | No   

Rajat Rokade   10 years AGO

10 /2=5 so atleast 10 hours

Like? Yes (1) | No   

Rahul Rathod   10 years AGO

10 /2=5 so atleast 10 hours

Like? Yes (1) | No   

susanta   10 years AGO

3 tap done 1 hr=1/5
1st done in 1 hr=1/10
2nd+3rd done in 1 hr=1/5-1/10
=1/10
2nd+3rd done full work =10 hr
if 3rd tap is not working then 2nd must take minimum 10 hr

Like? Yes (1) | No   

SREENIVASA RAO PALLAPU   10 years AGO

T1 + T2 + T3 will complete 1/5 th of the total work in 1 hour.
T1 alone complete 1/10 th of the total work in 1 hour.
=> T2 + T3 will complete 1/10 th of the total work in 1 hour
i.e T2 + T3 =1/5 - 1/10 = 1/10
so in any condition T2 will take at least 10 hours to complete the work( either T3 is on/off).

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

If there is no condition, then we could consider that the 3rd tap is not working (for minimum time by 2nd tap).
Therefore, 1/5 = 1/10 + 1/tap2 => 1/tap2 = 1/10
=> tap2 = 10 hours. Ans.

Like? Yes (1) | No   

priyanka   10 years AGO

Work done by (B+C) in 1 hr is (1/10)
B+C together takes 10 hrs
(1/B)+(1/C)=(1/10)
Therefore B>10

Like? Yes (1) | No   

kiran lata   10 years AGO

let A,B,C are three taps
A+B+C=5hrs
only A take=10 hrs
thus A drain half of tank in 2.5hrs.
B+c=2.5hrs
thus to complete drain a tank , B takes=4*2.5hrs=10hrs

Like? Yes (1) | No (1)  

guru   10 years AGO

1/5 = 1/10 + 1/x
1/x = 1/10
x=10

Like? Yes (1) | No (1)  

Pradeep Singh   10 years AGO

every tap has same efficiency so second tap also will take min 10 hours

Like? Yes (1) | No (1)  

Aparna Bhattacharya   10 years AGO

Three tap together drain a complete tank in 5 hours=1/5 hrs
first pipe drains this tank in 10 hours alone=1/10 hrs
so,then minimum hours taken by second or third tap will be
=( 1/5 - 1/10) = 1/10 or 10 hours.
Option : 1

Like? Yes (1) | No (2)  

23 Dec 2014 Area

A plot of land is in the shape of a right angled isosceles triangle. The length of the hypotenuse is 50*sqrt(2). The cost of fencing it at Rs.3 per metre will be:

OPtion

1) Less than Rs.300
2) Less than Rs.100
3) Less than Rs.400
4) Less than Rs.200
5) More than Rs.700
6) More than Rs.500
7) More than Rs.600
8) Less than Rs.500
9) More than Rs.800
10)None of these

Solution

Let each one of equal sides be x metres.
Then x^2+x^2 = (50*sqrt(2))^2
x = 50 m.
Perimeter = x + x + 50*sqrt(2) = 100 + 50*sqrt(2)
Therefore cost of fencing = Rs.3 * (100 + 50*sqrt(2))
= 511.5
More than Rs.500

Option 6)

Correct Option: 6 Best Solution (41)

K.ARun   10 years AGO

x^2 + x^2 = (50sq.rt(2))^2=5000
2x^2=5000--> x=50
perimeter of triangle = 50+50+50sq.rt(2)
=10+50*1.4146=170.73m
Cost of fencing=170.73*3=512.19

Like? Yes (7) | No (3)  

Prerna   10 years AGO

A plot of land is in the shape of a right angled isosceles triangle. The length of the hypotenuse is 50*sqrt(2). Base and height will be 50 mtrs. Perimeter of triangular plot will be 50+50 +50 *sqrt(2) i.e. approx 170 mtrs.
The cost of fencing it at Rs.3 per metre will be: approx 170*3= Rs 510. means more than Rs 500.

Like? Yes (3) | No   

Gagan Raj M   10 years AGO

For a Right angled triangle of side 'a', then length of hypotenuse is a*sqrt(2).
Hence Total length of plot (i.e perimeter of Right angled triangle) = 50+50+50*sqrt(2) = 170.71 mtrs
Therefore Cost of fencing = 3*170.71 = Rs.512.13(i.e > 500)

Like? Yes (3) | No (1)  

Jaspalsingh Parmar   10 years AGO

Firstly we have to find the length of each side of right angled isosceles triangle
Let the side of isosceles triangle be s

so according to given condition

(s)^2+(s)^2=(50sqrt2)^2

2(s)^2=5000

(s)^2=2500

so,
s=50

For facing we require all the side of triangles=s+s+50sqrt2
=s+s+70.71

Putting the value of s we get=50+50+70.71=170.71 m

Now The cost of fencing it at Rs.3 per metre will be=170.71*3 = 512.13Rs

So it is more than Rs 500
So option 6 is correct

Like? Yes (2) | No (1)  

Ajinkya Kulkarni   10 years AGO

512

Like? Yes (2) | No (1)  

sonu ram   10 years AGO

Here, The h=50sqrt(2).
Let other two sides will be-a:
then,
using pythagorus theorem:
a=50:
so total:50+50+50sqrt(2)=170.7m
Total cost will be=170.7*3=Rs 512.10.
Which is more than 500.

Like? Yes (2) | No (1)  

pallavi kumbhar   10 years AGO

length of side=50
total perimeter= 170.7
cost=170*3= 512

Like? Yes (1) | No   

Sai Siddartha   10 years AGO

The perimeter of the triangle with the said dimensions would be 50+50+50sqrt(2) = 170 (Approximately). Cost of fencing at Rs.3/Meter = 170*3 = Rs.510.

Like? Yes (1) | No   

shivali   10 years AGO

perimeter is 172
then 172*3=516Rs

Like? Yes (1) | No   

Mohit Garg   10 years AGO

Hypotenus of Right angled isoceles triangle is a*sqrt(2) = 50*sqrt(2)

So the Side of traignle is = 50

Now According to Pythagorus 3rd side Will be = sqrt(50*50 + 50*50) ~ 71

So Perimeter of plot is = 50+50+71 = 171

Now as Per 3 Rs/m total cost will be = 171*3 = 513 Rs.

Like? Yes (1) | No   

dilip   10 years AGO

perimeter is nearly 180,so perimeter*3 is the cost

Like? Yes (1) | No   

swarupa nuggu   10 years AGO

6

Like? Yes (1) | No   

lavanya   10 years AGO

let each one of the equal sides of the triangle in piece of land is x m
x^2+x^2=(50*sqrt(2))^2=>x=50 m
the perimeter of the land=x+x+50*sqrt(2)=100+50*sqrt(2)
the cost of fencing is
3(100+50*sqrt(2))=300+150*sqrt(2)=512

Like? Yes (1) | No   

Sanu Panji   10 years AGO

512.1

Like? Yes (1) | No   

Chirag Ranjan Lahiri   10 years AGO

Perimeter of the triangle
= 50 + 50 + 50*root2
= 100 + 50 x 1.4146 = 170.73 m
So, Cost of fencing = Rs(170.73 x 3) = Rs 512.19

Like? Yes (1) | No   

sneha sri   10 years AGO

other two sides are 50
perimeter=100+50×1.414
cost=perimeter×3=512.64

Like? Yes (1) | No   

KAUSHIK DAS   10 years AGO

The sides will be calculated as x=50.
total length=50+50+50*sqrt(2)
price = total length *3 =512.1

Like? Yes (1) | No   

Supriya Mondal   10 years AGO

let one edge is a meter
then
2a^2=5000
then a=50
so perimeter=(50+50+50*sqrt(2))
so cost needed =3*perimeter
which is more than 500
so option 6)more than 500 is the right answer

Like? Yes (1) | No   

Surit Datta   10 years AGO

If the hypotenuse of a right angled isosceles triangle is
50*sqrt(2)
Then its other two sides will be 50 miter each.
so perimeter is 150*sqrt(2)
so fencing it at Rs.3 per metre will be
150*sqrt(2)*3
which is Rs 636 (almost)
which is greater than 600
so option 7
That's it.

Like? Yes (1) | No   

mayank   10 years AGO

{50+50+50*sqrt(2)}*3

Like? Yes (1) | No   

MRITUNJAY   10 years AGO

perimeter of right angled issoceles triangle is 2a+b
by pythagoras theorem
a^2+a^2=5000
a=50
perimeter=2*50+70.7=170.7
cost of fencing =170.7*3
which is more than 500.

Like? Yes (1) | No   

sriharsha   10 years AGO

(50+50+50*sqrt(2))*3=510.3 approximate

Like? Yes (1) | No   

Pradyumna K S   10 years AGO

Let each one of the equal sides of the triangular piece of land be xm.Then, x 2 + x 2 = (50√2) 2 ⇒ x = 50 m⇒ The perimeter of the land = x + x + 50√2 = 100 + 50√2∴ The cost of fencing = Rs.3 (100 + 50√2) = Rs.(300 + 150√2) = ₹.512.1

Like? Yes (1) | No   

ABHINAV PUSHPAM   10 years AGO

Use paythagorous theorm.

Like? Yes (1) | No   

MRITUNJAY KUMAR   10 years AGO

Option)6

Like? Yes (1) | No (1)  

Md.Sultan Khichi   10 years AGO

Let x be this other side of isosceles right angle triangle.
So x^2+x^2=(50√2)^2
x=50
So premeter =50+50+50√2=50(2+√2)
Cost=3*50(2+√2)=512.13
Ans. Ob 6

Like? Yes (2) | No (2)  

Vinay Sipani    10 years AGO

Unit of hypotenuse isn't mentioned in the question

If it is assumed to be 50 sqrt (2) metre
For isosceles right angled triangle,remaining two sides are equal.
=> 2 * x^2 = (50 sqrt 2 )^2
=> x = 50 m

Hence,the perimeter of triangle = (100 + 50 sqrt 2 )m
=> Cost = Rs 512.132
=> option 6

Like? Yes (2) | No (2)  

kakali sarkar   10 years AGO

perimeter will be(s)= 50+50+50sqrt2
so the answer = s*3

Like? Yes (1) | No (1)  

Sundar Kumar   10 years AGO

Let the length of each of equal side of the triangle be x m. then,x^2+x^2+(50*sqrt(2))^2=5000
=>2x^2=5000
=>x=50
Perimeter of triangle=50+50+50*sqrt(2)
=100+50+1.4146=170.73m
coin of fencing=Rs.(170.73*3)=Rs.512.16
Answer: Option 6) More than Rs.500

Like? Yes (3) | No (3)  

nikhil   10 years AGO

a^2+a^2=(50*1.4)^2
=>a=50
total perameter=100+50*1.41
total cost=512

Like? Yes (1) | No (1)  

ranjithreddy   10 years AGO

perimeter=170mts
cost of fencing will be 170*3=510

Like? Yes (1) | No (1)  

sasidhar   10 years AGO

since it is an isosceles triangle the sides will b of 50mts. so as given Rs3/mt. hence the fencing for the three sides will be roughly 150(2+sqrt(2)). hence the value will be nearly Rs.512.45.

Like? Yes (1) | No (1)  

CHANDAN   10 years AGO

sides are: 50+50+50sqrt(2) =170.70 m.
cost= 170.70*3= Rs 512.10
so, answer is (6)

Like? Yes (1) | No (1)  

Devendra Marghade   10 years AGO

If the side of the triangular plot=x, then
x^2 + x^2 =[50*Sqrt(2)]^2
x^2=2500, x=50
So perimeter of the plot=2x+50*Sqrt(2)
=100+50*1.414= 170.71
The cost of fencing it at Rs.3 =3*170.71=512.13

Like? Yes (1) | No (1)  

shree   10 years AGO

sides of triangle=50m
perimeter of triangle=50+70.7+50=170.7
cost of fencing=3*170.7=512.1
cost is more than 500Rs.

Like? Yes (1) | No (1)  

Rahul Sharma    10 years AGO

if hypotenuse= 50*sqrt(2)
and triangle is right angled isosceles triangle.
then other two sides = 50, 50

so perimeter = 50+50+50*sqrt(2)
so cost = 3*(50+50+50*sqrt(2)) = 510.15

Like? Yes (1) | No (1)  

PAWAN KUMAR   10 years AGO

Hypotenuse = 50*sqrt(2)
So, p=b= 50m
Perimeter = 50 + 50 + 50*1.414 = 170.7m
Therefore, cost of fencing = Rs 170.7*3 = Rs 512.10 >500. Ans.

Like? Yes (1) | No (1)  

A M ANKIT KALLURAYA   10 years AGO

we know that in an isoceles trialngle any two of the sides are eqal....by tht hypothesis in the right angled triangle,we can conclude tht the three sides are 50sqrt2,50,50.....total length will become 170.41.....cost of the fencing is given by rs3 for every square metre...so the final cost is 512.22 which is more than 500

Like? Yes (1) | No (1)  

Ashwin Dinesh   10 years AGO

[50 + 50 + 50sqrt(2)] * 3 = Rs. 512.13
which is more than Rs 500
which is option 6)

Like? Yes (1) | No (1)  

Tania Chatterjee   10 years AGO

(50+50+50sqrt2)*3=512.13

Like? Yes (1) | No (2)  

Anil Kumar Telikicherla   10 years AGO

The perimeter of the triangle with the said dimensions would be 50+50+50sqrt(2) = 170.7 (Approximately). Cost of fencing at Rs.3/Meter = 170.7*3 = Rs.510.21, greater than 500

Like? Yes (1) | No (2)  

22 Dec 2014 Sequence

What is the next number of the following sequence.
.5, 2, 6.5, 20, .....

OPtion

1) 47
2) 64.5
3) 98
4) 528
5) 60.5
6) 78.5
7) 82
8) 68
9) 39.5
10) 72

Solution

This sequence is
1/2 = .5
(1+3)/2 = 4/2 = 2
(1+3+3^2)/2 = 13/2 = 6.5
(1+3+3^2+3^3)/2 = 40/2 = 20
Similarly
(1+3+3^2+3^3+3^4)/2 = 121/2 = 60.6

Option 5)

Correct Option: 5 Best Solution (34)

Dr.Dipin Singh   10 years AGO

0.5+1.5*1=2
2+1.5*3= 6.5
6.5+1.5*3*3=20
20+1.5*3*3*3 = 60.5 ... option 5

Like? Yes (8) | No (1)  

venkatesh.p   10 years AGO

0.5,2,6.5,20,......

0.5x3 + 0.5 = 2 2x3 +0.5 = 6.5 6.5x3 +0.5 = 20 20x30+0.5 = 60.5

Like? Yes (4) | No (1)  

K.ARun   10 years AGO

Difference of 2nd and 1st no and multiply it by 3 and add them with the current no.
0.5 ------> (0.5-0)*3 + 0.5 -------> 2
2 -----> (2-0.5)*3 + 2--------> 6.5
6.5 ------>(6.5-2)*3 + 6.5------> 20
20 ------->(20-6.5)*3 + 20 -----> 60.5

Like? Yes (6) | No (4)  

Santosh Kumar Behera   10 years AGO

.5*3=1.5+.5=2
2*3=6+.5=6.5
6.5*3=19.5+.5=20
so 20*3=60+.5=60.5

Like? Yes (2) | No   

Vinay Sipani    10 years AGO

0.5 * 3 + 0.5 = 2
2 * 3 + 0.5 = 6.5
6.5 * 3 + 0.5 = 20

=> next term = 20 * 3 + 0.5 = 60.5

Like? Yes (2) | No (1)  

Jaspalsingh Parmar   10 years AGO

2-0.5=1.5
6.5-2=4.5
20-6.5=13.5

As we see answer is multiple of 3 to the previous answer
so
13.5*3=40.5

20+40.5=60.5
So the option 5 is correct

Like? Yes (2) | No (1)  

Supriya Mondal   10 years AGO

Difference between 1st and 2nd number is=1.5
and difference between 2nd and 3rd number is=4.5 which is 3 times of the difference between 1st and 2nd number.
Like that difference between 3rd and 4th number is=13.5 which is 3 times of the difference between 2nd and 3rd number.
like that, difference between 4th and 5th number is=(13.5*3)=40.5
So, next number is (20+40.5)=60.5
So option 5)60.5 will be the correct answer

Like? Yes (2) | No (1)  

Devendra Marghade   10 years AGO

0.5+ 0.5*3= 0.5+1.5 =2
2+ 1.5*3= 2+ 4.5= 6.5
6.5+4.5*3= 6.5+ 13.5=20
20+13.5*3= 20+ 40.5=60.5

Like? Yes (1) | No   

ITHA Naresh Babu   10 years AGO

1/2,4/2,13/2,40/2.........
diffrence in numerators is 3,9,27,81.........
so next number will be (40+81)/2=121/2=60.5

Like? Yes (1) | No   

Tania Chatterjee   10 years AGO

.5 + (3^1)*.5 =2
2+(3^2)*.5=6.5
hence 20+((3^4)*.5=60.5

Like? Yes (1) | No   

Surit Datta   10 years AGO

The difference between 2 and .5 is 1.5
difference between 6.5 and 2 is 4.5
which is thrice of the first difference
similarly difference between 20 and 6.5 is 13.5
which is thrice of the second difference
continuing this way the next difference will be
13.5*3 = 40.5
so the next number will be
20+40.5
which is 60.5
That's it..
Option 5

Like? Yes (1) | No   

llamar   10 years AGO

0.5*3=1.5+0.5=2
2*3=6+0.5=6.5
6.5*3=19.5+0.5=20
20*3=60+0.5=60.5

Like? Yes (1) | No   

P.ARUNA   10 years AGO

0.5+(0.5)*3=2
2+(0.5)*9=6.5
6.5+(0.5)*27=20
20+(0.5)*81=60.5

Like? Yes (2) | No (1)  

MRITUNJAY   10 years AGO

multiply by 3 and add 0.5
20*3+0.5=60.5

Like? Yes (1) | No   

tirupathi reddy   10 years AGO

0.5, 2, 6.5, 20, .....
0.5 + 1.5. = 2
2 + 1.5*3 = 6.5
6.5 + 4.5*3 = 20
20 + 13.5*3 = 60.5

Like? Yes (1) | No   

sravani   10 years AGO

diff 0.5,2=1.5
diff 2,6.5=4.5=1.5*3
diff 6.5,20=13.5=1.5*9
next 20,60.5=40.5=1.5*27

Like? Yes (1) | No   

SREENIVASA RAO PALLAPU   10 years AGO

2-0.5 =1.5
6.5 - 2 = 4.5 (i.e 1.5 x 3)
20 - 6.5 = 13.5 (i.e 4.5 x 3)
next number = 20 + (13.5 x 3) = 60.5

Like? Yes (1) | No   

vikram   10 years AGO

0.5*2=1+1=2
2*2=4+2.5=6.5
6.5*2=13+7=20
20*2=40+20.5=60.5

Like? Yes (1) | No   

MURUGESAN.P   10 years AGO

2-.5=1.5
6.5-2=4.5
20-6.5=13.5
4.5-1.5=3(3^1)
13.5-4.5=9(3^2)
next difference will be 27(3^3)
so the series is
.5,2,(3+1.5+2),(9+4.5+6.5),(27+13.5+20)
this equal to .5,2,6.5,20,60.5
so the ans is 60.5

Like? Yes (1) | No   

khushboo goenka   10 years AGO

add 1.5 thn 4.5 thn 13.5 thn 40.5

Like? Yes (1) | No   

Ajinkya Kulkarni   10 years AGO

60.5

Like? Yes (1) | No   

sanjeev kumar   10 years AGO

Ans 5

Like? Yes (1) | No   

PAWAN KUMAR   10 years AGO

(0.5-0)*3 + 0.5 = 2
(2-0.5)*3 + 2.0 = 6.5
(6.5-2)*3 + 6.5 = 20
(20-6.5)*3 + 20 = 40.5 + 20 = 60.5. Ans.

Like? Yes (1) | No   

nikhil   10 years AGO

1)0.5*1=0.5
2)0.5*1+0.5*3+0.5*9+0.5*27+0.5*81=60.5

Like? Yes (1) | No   

K.NagaSugunaManasa   10 years AGO

.5,2,6.5,20
2-0.5=1.5 6.5-2=4.5 , 20-6.5=13.5;
4.5-1.5=3, 13.5-4.5=9,so next is 27(3*3*3)
s0 27+13.5=40.5
so add 40.5 to 20
40.5+20=60.5
option is 5

Like? Yes (1) | No   

Ankit Pandey   10 years AGO

0.5*4=2
2*3+2/4=6.5
6*3+0.5*4=20
20*3+20/40=60.5

Like? Yes (1) | No   

Md.Sultan Khichi   10 years AGO

.5*3+.5=2
2*3+.5=6.5
6.5*3+.5=20
20*3+.5=60.5
Ans. 60.5

Like? Yes (1) | No   

shovan Manna   10 years AGO

the sequence is like *3+.5 with previous term to get the net term

Like? Yes (1) | No   

lavanya   10 years AGO

0.5=1/2
2=4/2
6.5=13/2,
20=40/2,
and the difference between numerators is 3,9,27,81...
ans is 121/2=60.5

Like? Yes (1) | No   

shree   10 years AGO

(.5*3+0.5), (2*3+0.5), (6.5*3+0.5), (20*3+0.5=60.5)
=> 60.5 is ans

Like? Yes (1) | No   

MRITUNJAY KUMAR   10 years AGO

Option)5

Like? Yes (1) | No   

SHANMUGAPRIIYAN   10 years AGO

0.5+(3*05)=2
2+(3 pow 2*0.5)=6.5 3 pow 2=9
6.5+(3 pow 3*0.5)=20 3 pow 3=27
therefore, 20+(3 pow 4*0.5)=60.5 3 pow 4=81
ANSWER 60.5

Like? Yes (1) | No   

ABHINAV PUSHPAM   10 years AGO

*3+.5 in each no.

Like? Yes (1) | No (1)  

Rats   10 years AGO

(.5*3)+.5=2
(2*3)+.5=6.5
(6.5*3)+.5=20
(20*3)+.5=60.5

Like? Yes (1) | No (1)  

20 Dec 2014 Time and Distance

A man cycles at the rate of 15.6 kmph. How many metres does he cover in 2 minute.

OPtion

1) 31.2 m
2) 260 m
3) 520 m
4) 5200 m
5) 1226 m
6) 876 m
7) 156 m
8) 368 m
9) 3600 m
10)None of these

Solution

Speed = 15.6 km/hr = (15.6 * 5/18) m/sec = 13/3 m/sec
Distance covered in 2 min = (13/3 * 120)m = 520 m

Correct Option: 3 Best Solution (63)

kumari jyoti   10 years AGO

speed=15.6*5/18 m/s.
time given=2*60 s.
so, distance travelled= speed*time= 520m

Like? Yes (7) | No   

sriharsha   10 years AGO

man covers 15.6km in1 hour(60 minutes).same person within 2 minutes covers (2*15.6)/60 km .i.e 520 mt.

Like? Yes (4) | No   

Surit Datta   10 years AGO

speed = 15.6 kmph
which is = (15.6*5)/18 m/sec
which is = 13/3 m/sec
so covered in 2 min or 120 sec is
(13/3)*120
which is 520 mitres.
That's it.
option 3.

Like? Yes (7) | No (4)  

Vinay Sipani    10 years AGO

distance travelled = speed * time taken

speed = 15.6 * 1000 / 60 = 260 m / min
=> distance travelled = 260 * 2 = 520 m

Like? Yes (5) | No (2)  

POOJA SINGH   10 years AGO

15.6 kmph=15.6*5/18 m/sec= 4.33 m/sec
so,in 2min it covers 4.33*120 m=520 m.

Like? Yes (2) | No   

K.ARun   10 years AGO

520m

Like? Yes (2) | No   

THUMMALA VINEESHA   10 years AGO

dis=speed*time
dis=15.6*(5/18)*2*60
dis=520m

Like? Yes (2) | No   

Hemavathy Nangan   10 years AGO

distance=speed*time
=(15.6)*(5/18)*120
=520m

Like? Yes (1) | No   

Sumit Kumar   10 years AGO

2minutes*((15.6*1000)metera/60 minutes)=520 m

Like? Yes (1) | No   

jnv somayajulu   10 years AGO

d=st

Like? Yes (1) | No   

shovan Manna   10 years AGO

15.6*1000*2/60=520m

Like? Yes (1) | No   

Ashwin Pandey   10 years AGO

velocity=distance/time

Like? Yes (1) | No   

Aishwariya    10 years AGO

15.6 km/ hr to m/ s = 5/ 18 * 15.6
= 4.33 m/ s
1 sec - 4.33
120 seconds - ?
ans = 520 m

Like? Yes (1) | No   

Govindaraj K   10 years AGO

As per information he will travel 15600m in 60min then for 2min it will be 520m

Like? Yes (1) | No   

Devendra Marghade   10 years AGO

In minutes distance covered=2*15.6*1000/60 meters=520 m.

Like? Yes (1) | No   

shree   10 years AGO

distance=rate *time=15.5*(5/18)*120=520

Like? Yes (1) | No   

neha   10 years AGO

distance=speed*time
15.6*(5/18)*2*60=520m

Like? Yes (2) | No (1)  

Asim Dinda   10 years AGO

15600/60*2

Like? Yes (1) | No   

BASANAGOUDA KODIGOUDRA   10 years AGO

15.6/60=.26*1000=260 meters/minutes

so 260*2=520 m

Like? Yes (1) | No   

Mahantesh Desai   10 years AGO

speed in m/s = (15.6*5)/18 = 13/3 m/s
time in sec 1 min = 120 sec
distance = speed * time = 120 * 13/3=520 m

Like? Yes (1) | No   

Shiva Nandyala   10 years AGO

Given speed = 15.6 kmph = 15.6 * 1000 m/ hr = 15.6*1000/60 mtr/min.
distance covered = speed (in mtr/min) * time(in min)
= (15.6*1000/60) * 2 = 520mtrs

Like? Yes (1) | No   

Sambar Naresh   10 years AGO

15.6 kmph = (15.6*1000)/60 mtr/mnt
260 mtrs
for 2mnts =260*2=520 m

Like? Yes (1) | No   

Anjali   10 years AGO

15.6 kmph = 260 m/min
in 2 min distance covered = 260*2 = 520 m

Like? Yes (1) | No   

chanti babu   10 years AGO

he directly given that
for 60 min..---------->15.6 kms
we want for 2 min..-------> ???.
it is direct proportion
so,
2/60 * 15.6
=0.52 kms
=520 m.

Like? Yes (1) | No   

Aditya Verma   10 years AGO

Distance=15.6kmph*2min
so D=520m

Like? Yes (2) | No (1)  

A M ANKIT KALLURAYA   10 years AGO

15.6*1000/30=520

Like? Yes (1) | No   

Anusree V R   10 years AGO

15.6km per hr means .26km in a min.. so .26*2 =.52km in 2min.
=.52*1000=520m

Like? Yes (1) | No   

Pradeep   10 years AGO

520 m as 15.6 kmph for 1 min = 15.6*1000/ 60 =260 m ;; 260*2 =520 m

Like? Yes (1) | No   

JUHI RAI   10 years AGO

speed=dis/time
15.6*5/18=dis/120
d=519.99=520m

Like? Yes (1) | No   

Suresh Kumar Kamaraj   10 years AGO

60 min 15.6 km
2 mins 520 m

Like? Yes (1) | No   

ramakrishnateja   10 years AGO

given that man cycles at the rate of 15.6 Kmph which means that he covers 15.6 km in 1 hr i.e in 60 min. so for 2 min he can cover 2*15.6*1000/60=520m.

Like? Yes (1) | No   

Akhila   10 years AGO

in 1 hour---15.6 km
in 1 min---260 m
so, in 2mins--520mts

Like? Yes (1) | No   

Ethetic   10 years AGO

Converting hours into minutes you get 60 minutes in one hour. Therefore if you divide the 15.6kmph by 30, you will get the kilometers per 2 minutes. You want it in meters though, so by converting kilometers into meters you multiply it by 1000.

15.6 / 30 = 0.52
0.52 x 1000 = 520m.

Like? Yes (1) | No   

Aravinth kumar   10 years AGO

3

Like? Yes (1) | No   

Suman Chatterjee   10 years AGO

(15600/60)*2

Like? Yes (2) | No (1)  

veeranjaneyulu   10 years AGO

15.6x0.27=4.333m/s
for 2 mns it is 520 m

Like? Yes (1) | No   

niraj   10 years AGO

4.33*120=520

Like? Yes (1) | No   

tejaswini   10 years AGO

speed of man=15.6km/hr
speed of man =15.6(1000/60)m/min
distance travelled by man in 2 min=15.6(1000/60)(2)=520

Like? Yes (1) | No   

Sandeep Kumar   10 years AGO

distance = speed*time = ((15.6 *1000)/60)*2 = 520 m

Like? Yes (1) | No   

satyanarayana   10 years AGO

15.6*(5/18)*120=520meters

Like? Yes (1) | No   

karumanchi sai pradeep chandra   10 years AGO

15.6*2*1000/60

Like? Yes (1) | No   

monica ravie   10 years AGO

d = s * t
(15.6* 5/18) * (2*60)
= 520m

Like? Yes (1) | No   

Saravanakumar   10 years AGO

15.6kmph=15600 meter in one hour (60 minutes).
therefore
For 2 minutes,
15600/30 = 520 m

Like? Yes (1) | No   

Rishi Pandey   10 years AGO

15.6 km=15600 m in 60 min
in 1 min= 15600/6=260 m
in 2 min= 2×260=520m

Like? Yes (1) | No   

sangram singh   10 years AGO

total=(156*1000/10*60)*2=520

Like? Yes (1) | No   

sai sindhu   10 years AGO

speed=distance/time
distance=speed*time
d=(15.6*1000/60)*2
in the above we are converting kmph into m per minute
d=520m

Like? Yes (1) | No   

Arijit Acharyya   10 years AGO

15.16kmph = 15.16*(5/18) = 4.33333 mpsec
now 2 min = 120 sec
in 2 minute he covers 4.33333*120 = 520 m

Like? Yes (1) | No   

Maharajancm   10 years AGO

60min=15.6km=15600m
15600/60min=260
260*2=520

Like? Yes (1) | No   

merva.gayathri   10 years AGO

d = speed * time

= ((15.6 * 1000 )*(2)) / (60)
d = 520 m

Like? Yes (1) | No   

RAKESH   10 years AGO

in m/s =156*5/18=39/9m/s
in m/min=39/9*60
so, in 2 minutes
=2*39/9*60
=520m

Like? Yes (1) | No   

siva shankar   10 years AGO

for a minute its 260 meters ,so for two minutes its 520

Like? Yes (1) | No   

Jaspalsingh Parmar   10 years AGO

speed=15.6*(5/18)=4.333
for 2min=120 sec=120*4.333=520m

Like? Yes (1) | No   

Ashish Kalyanwat   10 years AGO

its easy clss 6th ques

Like? Yes (1) | No   

Yuvaraj   10 years AGO

15.6 km in 1 hour.. (1 km = 1000m) (1 hours = 60 mins)
15.6*1000 metres in 1*60 minutes.
15600 metres in 60minutes.

For 1 minute, = (15600/60)
= 260 Metres

For 2 minutes = 260*2
= 520 Metres

Like? Yes (1) | No   

Mounika   10 years AGO

Guessed

Like? Yes (1) | No   

anurag bhargava   10 years AGO

Rate of cycling = 15.6 kmph
1 kmph=300/18 mt/min
Therefore, in 2 minutes, distance covered = 2*15.6*300/18
=520mt in 2 minutes

Like? Yes (1) | No   

satyam sharma   10 years AGO

(15600/ 60)*2=520 m

Like? Yes (1) | No   

Jeet Adhikari   10 years AGO

speed=15.6 km/hr
in 60 minutes he goes 15.6*1000 meter
then in 2 mns he goes 15.6*1000*2/60=520meter

Like? Yes (1) | No   

sneha sri   10 years AGO

distance =15.6×2/60×1000=520m

Like? Yes (1) | No (1)  

Supriya Mondal   10 years AGO

Speed of the man is=15600m/hr
so in 2 min he goes=(15600/60)*2=520 m
so option 3)520 m is the right answer

Like? Yes (1) | No (1)  

G.ARUNKUMAR   10 years AGO

i have solved it

Like? Yes (1) | No (1)  

MADHU   10 years AGO

15.6 kmph*5/18=4.33m/sec
Then 4.33m/sec*60sec/1min
=259.80 meter/min
=259.08metr/min*2min
=519.60=520 meters

Like? Yes (1) | No (1)  

poornima    10 years AGO

ans is 520

Like? Yes (1) | No (1)  

19 Dec 2014 Percentage

On decreasing the price of fans by 30%, the sale is increased by 20%. What is the effect on money receipt by the shopkeeper?

OPtion

1) 10% increase
2) 15% increase
3) 10% decrease
4) 15% decrease
5) 16% increase
6) 16% decrease
7) 20% increase
8) 20% decrease
9) 22% increase
10)None of these

Solution

Let cost of each fan = Rs.100 & sale = 100 fans.
Money receipt = Rs.(100*100) = Rs.10000
New cost per fan = Rs.70 and New sale = 120 fans
New Money Receipt = Rs.(70*120) = Rs.8400
Decrease in money receipt = (1600/10000)*100 = 16%

Correct Option: 6 Best Solution (40)

Ashwin Dinesh   10 years AGO

Let CP of 1 fan = Rs. 100
On selling 100 fans shopkeeper gets: RS 10,000
If cost is decreased by 30% i.e. CP of 1 fan = Rs. 70
20% sale increases i.e. 120 fans are sold.
So 120*70 = RS. 8,400
i.e. a decrement of Rs. 1,600
1600*100/10000 = 16% decrement
which is option 6)

Like? Yes (41) | No (12)  

MRITUNJAY   10 years AGO

%decrease=-30+20-600/100=-16 %decrease

Like? Yes (42) | No (20)  

Supriya Mondal   10 years AGO

let price of the fan is Rs.100 and sell also 100
Then total money he get=100*100=10000
After decreasing fan's price it is Rs.70
and after increasing sell it is 120
Now total money he get=70*120=8400
so money receipt decrease and decrease percentage is=(1600/10000)=16%
so option 6)16% decrease is the correct answer

Like? Yes (7) | No (1)  

Rahul Rathod   10 years AGO

Assume total fans sell is 5 having price 100 rs each
So total sell price =100*5=500
Now the price of fan=100-30=70
Sell =(5+1)*70=420
Hence option (6) is correct

Like? Yes (5) | No (1)  

SREENIVASA RAO PALLAPU   10 years AGO

let initial sale is 'n' items and price of each item is 'y'
then total income = ny /-
price decreased by 30% =>0.7y
sale is increased by 20% =>1.2n
total income after =0.7y x 1.2n =0.84(ny)
decreased income =ny - 0.84ny =0.16ny =>16%

Like? Yes (4) | No   

Sambar Naresh   10 years AGO

let us assume each fan cost is Rs 100 and sale 100 fans
reciept=100*100= 10,000 Rs
New cost per fan is 70 Rs and New sale is 120 fans
New Money Receipt 70*120= 8400 Rs
((1,600/10,000)*100 )% = 16% Decrease in money receipt.....

Like? Yes (4) | No   

sanjeev kumar   10 years AGO

Ans16%

Like? Yes (4) | No (1)  

K.ARun   10 years AGO

Let, price = Rs.100, sale = 100
Then, sale value = Rs.(100×100)  =Rs.10000
New sale value = Rs.(70×120)=Rs.8400  

so 16% Decrease

Like? Yes (3) | No   

K.NagaSugunaManasa   10 years AGO

Assume total amount=100
decrease 30% then,amount is 70
Now increase 20% on 70 == 14
so add 14 to 70
Total is 84
So 100-84=16%decrease

Like? Yes (3) | No   

POOJA SINGH   10 years AGO

Let, price = Rs.100, sale = 100
Then, sale value = Rs.(100×100)=Rs.10000
New sale value = Rs.(70×120)=Rs.8400
Decrease % = (1600/10000×100)%=16%

Like? Yes (2) | No   

Dr. Divya   10 years AGO

If earlier 100 fans were sold @ Rs 100 per fan,
total sales/receipt= Rs 100*100= Rs 10000/-
Now 120 fans were sold @ Rs 70 per fan,
total sales/receipt= 120870= Rs 8400/-
decrease in receipt = Rs 1600
% decrease = 100*1600/10000= 16%

Like? Yes (4) | No (2)  

Devendra Marghade   10 years AGO

If original price=x & Sale=y, then money received=x*y
New price=(70/100)x & Sale=(120/100)y, then
money received=(70/100)x *(120/100)y=0.84x*y
So %decrease in money received=100- (100*0.84)= 16

Like? Yes (2) | No   

PAWAN KUMAR   10 years AGO

Let the price of one fan be Rs x and the total no of fans sold be y.
So, money receipt = Rs x*y
Now, price of one fan = Rs0.7x
Total no of fans sold = 1.2y
New money receipt = Rs 0.7x*1.2y = Rs 0.84*x*y
Decease in receipt = x*y - 0.84*x*y = Rs 0.16x*y
% decrease = (0.16x*y/x*y)*100 = 16% Ans.

Like? Yes (3) | No (1)  

k.d.n padma rao   10 years AGO

Let us take 100 fans are sold for 100 rs i.e 1000 rs

If price of fan decreased to 700, fans saled are 120..i.e 8400 rs
%change is 16% decreased

Like? Yes (2) | No   

Ranjan   10 years AGO

16% decrease

Let Initial price =100
After discount= 70

Sale is incresed by 20% means 70+20% of 70=84
new sp= 84

overall effect=100-84=16 i.e..decrease of 16%.
so answer is option 6.

Like? Yes (2) | No   

anupriya sinha   10 years AGO

70/100*120/100 =84/100
100-84 =16 % answer

Like? Yes (2) | No   

shree   10 years AGO

consider, price of fan= x
no of fans sold=y
therefore total money=z=x*y

now the price is decreased by 30 % then,
total money =p=0.7x*1.2y=0.84*x*y=0.84z

therefore the effect on money= p-z= 0.84z-z=-0.16z

therefore the money is decreased by 16%

Like? Yes (2) | No   

shovan Manna   10 years AGO

let initialy the price of the fan was Rs 100 and the sell was 100.
so the money receipt by the seller =Rs(100*100)
=Rs10000
now the price of the fan is=Rs70 and the no of sell is =120
then money receipt the seller is=Rs (70*120)
=Rs 8400
so money receipt decrease by=(10000-8400)*100/10000
= 16%

Like? Yes (2) | No   

Prateek Pandey   10 years AGO

Let the initial amount of a fan is 100rs and total 100 fans are sold everyday then the total amount received by the shopkeeper will be 100*100=10000rs
But now if the rate of the fan is decreased by 30% new price will be 70rs and if the sales is increased by 20% then now a total no of 120 mails will be send to them so now the new amount received by the shopkeeper will be 70*120=8400
So the %decrease in amount received by shopkeeper is given by (10000-8400/10000)*100=(1600/10000)*100=16% decrease

Like? Yes (2) | No   

ABHI   10 years AGO

it the price is decreased by 30% the remaining is 70%.here in the ques given that when the price decreases by 30% ,20% sales increased that means in 70% ,20% is 14%.By adding both we get 70%+14%=84% still 16% loss.

Like? Yes (2) | No   

vivek tomar   10 years AGO

16% decrease because 100*100=10000 original then after decrease it becomes 70*120=8400
so decrease=1600/10000*100=16% decrease

Like? Yes (2) | No   

veeranjaneyulu   10 years AGO

first consider 100 after 30% discunt it is 70 ....then it is increased 20% then 84% then it will decrease by 16%

Like? Yes (2) | No   

MP    10 years AGO

If earlier receipt is Rs 100, then new receipt = 100*0.7*1.2= Rs 84.
so decrease in receipt = 100-84=16%

Like? Yes (3) | No (2)  

Rajat Rokade   10 years AGO

Suppose there are 10 fans selling at 100 rs each.
So the shopkeeper is receiving 10*100=1000 rs.
Now the 30% decrease in price. So the new price=70 Rs.
The sale is increased by 20% i.e. 12 fans now.
New receiving amount= 70*12=8400 Rs.
So 16% decrease.
So option 6 is correct.

Like? Yes (3) | No (2)  

Thalamanchi Kishan Kumar   10 years AGO

let cost of the each fan=Rs.100 and sale=Rs.100 fans
money receipt =100*100=10000
new cost per fan=70 and new sale=120 fans
new money receipt =70*120=8400
Decrease in money receipt =(1600/10000)*100=16%

Like? Yes (2) | No (1)  

Ramesh Sriram   10 years AGO

let quantity=100 and price=100
revenue=100*100
new Quantity=120 and price=70
new revenue=70*120
decrease=(1600/10000)*100
=16

Like? Yes (2) | No (1)  

Surit Datta   10 years AGO

Let cost of each fan is Rs 100
and sale = 100 fans
money receipt = Rs. (100*100) = Rs 10000
New cost per fan = Rs 70
new sale 120 fans
New money receipt is = (70*120) = Rs 8400
Decrease in money receipt =(1600*100)/10000
which is 16%
so option 6
That's it.

Like? Yes (2) | No (1)  

SAYAN CHATTERJEE   10 years AGO

let the price of each item be 100
and the total no. of item sold be 100
now price decreases to 70
sales increases to 120
so, previous money= (100*100)= 10000
present money= (120*70)= 8400
so decrease in money= ((10000-8400)/10000*100)%= 16%

Like? Yes (2) | No (1)  

Jaspalsingh Parmar   10 years AGO

Let, price = Rs.100, sale = 100
Then, sale value = Rs.(100×100) =Rs.10000
New sale value = Rs.(70×120)=Rs.8400
Decrease % = (160010000 ×100)%=16%

Like? Yes (4) | No (3)  

sompon temtheerakij   10 years AGO

before = 1 * X
after = 0.7 * X * 1.2 = 0.84 X

Like? Yes (1) | No   

khushboo goenka   10 years AGO

coz ffrstly total rs=100x now rs are 84x

Like? Yes (1) | No   

madhusudhanreddy   10 years AGO

let,cost each fan=100 RS
sales=100fans
money rcepit=100*100=10000
newcost=70RS
new sales=120fans
new moneyrecepit=70*120=8400
decreses=(1600/10000)*100=16%
so,soultion is 16% decreases in money recepit

Like? Yes (5) | No (4)  

Ranjit Somisetty   10 years AGO

SP-CP/CP*100
x be sales AND Y be cost
{(1.2X*0.7Y)-(XY)}/XY=-0.16

Like? Yes (2) | No (1)  

sravani   10 years AGO

let the price of each item be x
and no.of items be Y
so the normal gain would be xy
but now it is (70/100 ) X*(120/100) Y=84/100xy
so it is 16% loss to him...

Like? Yes (2) | No (1)  

anuj gupta   10 years AGO

16 % decrease.

Like? Yes (1) | No   

Anjali   10 years AGO

100---> 30% decrease in prices ---> 70
70 ---> 20% increase in sales ---> 84
we arrive from 100---->84
thus a 16% decrease in money received by shopkeeper

Like? Yes (1) | No   

lavanya   10 years AGO

Let, price = Rs.100, sale = 100
Then, sale value = Rs.(100×100)=Rs.10000
New sale value = Rs.(70×120)=Rs.8400
Decrease % = (1600/10000×100)%=16%

Like? Yes (2) | No (1)  

sourabh verma   10 years AGO

suppose initialy price of fans was x and sale was y
so money receipt by shopkeeper was xy
after 30% decrease in price and 20% increase in sale
money receipt by shopkeeper is .7x*1.2y,
i.e. .84xy
so ((xy-.84xy)*100)/xy
i.e. 16% decrease

Like? Yes (1) | No   

Pramod Gaikwad   10 years AGO

Option 6 is correct.

Like? Yes (4) | No (4)  

Mithun Kumar Kesari   10 years AGO

16

Like? Yes (1) | No (1)