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A SIRISHA 10 years ago

Q . In a certain camp , 20% of the boys are from Maharashtra state and30% of those are from Bombay city. If there are 49 boys in the camp who are from Maharashtra state but not from Bombay city, what is the total number of boys in the camp ? WITH EXPLANATION

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tejasvi gamini 10 years ago

Boys from maharasthra=20% of B
Boys from Bombay =30% of B
Boys but not frm Bombay =70% of B
Boys frm Maharashtra but not from Bombay =49
=>20B/100*70B/100=49
Total boys B=4900/14=350

Like? Yes | No

A SIRISHA 10 years ago

Q.I mixed some water in pure milk and the mixture is sold at the cost price of the milk. If I gained 16 ⅔% ,in what ratio did I mix water in the milk ? WITH EXPLANATION

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A SIRISHA 10 years ago

Q. By mixing water a man gains the profit of ((100/9) %). Find the quantity of water mixed by him.
WITH EXPLANATION

Reply Like? Yes (1) | No (1)

A SIRISHA 10 years ago

Q. If the radius of a circle is decreased by 50%, its area is reduced by ...? WITH EXPLANATION

Reply Like? Yes (2) | No (1)

A SIRISHA 10 years ago

Q. if the price of wheat be raised by 30% , find by how much percent a house holder must reduce his consumption so as not number increase his expenditure ? WITH EXPLANATION

Reply Like? Yes (2) | No (1)

A SIRISHA 10 years ago

Q. In an election between two candidates , a candidate who gets 40% of total votes is defeated by 15000 votes. The number of votes polled by the winning candidate is ? WITH EXPLANATION

Reply Like? Yes (2) | No (2)

A SIRISHA to vishnuvardhan 10 years ago

To do a piece of work,B takes 3 times as long as A and C together, and C takes twice as long as A and B together .If the three together can complete the work in 10 days , how long would A take by himself ? with explanation

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abhishek narayan 10 years ago

Let the time to complete the job by A,B and C is a,b and c each respectively.
Given, b=3*{ac/(a+c)}
and c=2*{ab/(a+b)}
eliminating c, we have 5a=3b.
c=4/5a.
also 1/a + 1/b + 1/c= 1/10.
1/a + 3/5a + 4/5a= 1/10.
Hence, a= 24 days.

Like? Yes (3) | No

A SIRISHA to Tharun 10 years ago

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A SIRISHA to Tharun 10 years ago

If A is thrice as good as a workman as B and so takes 60 days less than B for doing a job. find the time in which they can do it together ? with explanation

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Devendra Marghade 10 years ago

22.5 days

A=B/3 and B-A=60 , So A=30, B=90
Together A & B will complete the job in 1 /[(1/30) + (1/90)]=90/4 =22.5 days

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A SIRISHA to Narendra 10 years ago

Rs . 78 is divided among 7 men ,11 women and 5 boys so that each women may have thrice as much as a boy and as much as a man and a boy together . Find the share of a man ? with expLAnation.......

Reply Like? Yes (19) | No (4)

abhishek narayan 10 years ago

7M+11W+5B=78.
W=3B.
W=M+B.
Therefore, 7M+(33/2)M+(5/2)M=78
Hence, M=3.

Like? Yes (15) | No (8)

A SIRISHA to sai naveen vanapalli 10 years ago

Three persons A,B,C rent the grazing of the park for Rs 570. A puts 126 oxen in the park for 3 months , B puts in 162 oxen for 5 months and C puts in 216 oxen in 4 months . what part of rent should B pay ?
I NEED COMPLETE SOLUTION PLZ HELP ME

Reply Like? Yes (2) | No (1)

ARJUN PRASAD 10 years ago

a:b:c=126*3 : 162*5 : 216*4 = 378 : 810 : 864 ,so b=810*570/2052=225
answer is 225

Like? Yes (12) | No

A SIRISHA to Ramesh Sriram 10 years ago

A can do as much work as C in 2 days and C does in 3 days as much work as B in 4 days.what time B would require to do a work which A can finish in 16 weeks ? I NEED COMPLETE SOLUTION PLZ HELP ME

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A SIRISHA 10 years ago

Reply Like? Yes (93) | No (28)

sarbeswar panda 10 years ago

assume 100 units of work, so together they work @ 10 units/day
let A, B, C work @ a,b,c units /day
(a+c) = 3b ....... (i)
(a+b) = 2c ....... (ii)
a+b+c = 10 ..... (iii)

solving the system , we get
a = 25/6, b = 5/2, c = 10/3
----------------------------------------
A will take 100/(25/6) = 24 days
B will take 100/(5/2) = 40 days
C will take 100/(10/3) = 30 days

Like? Yes (85) | No (84)

ABHISHEK KUMAR 9 years ago

according to question,
1 day work of A,B & C=
A+B+C= 1/10 -(i)
A+C=3B -(ii)
A+B=2C -(iii)
on solving equation (i)&(ii),
we get B=40 days
on solving equation (i)&(iii),
we get C= 30 days
put the value of B & C one day work in equation (i),
A=1/10-1/40-1/30=(12-3-4)/120=5/120=1/24 part of work in one day,
so, to complete the work required day for A = 24 days.

Like? Yes (121) | No (19)

Vibhor 8 years ago

B:A+C = 1:3 and C: A:+B = 1:2 that is the efficiency ratio which is inverse of time time taken.
B:A+C can also be written as B/A+C = 1/3
similarly C/A+B =1/2
now adding 1 both sides in both the equations we get
1+B/A+C =1/3 +1 or A+B+C/A+C=4/3 ------1

similarly 1+C/A+B =1/2 +1 or A+B+C/A+B=3/2 ---------2
multiply equation first with 3 and equation 2 with 4 we get
A+B+C=12 & A+C =9
A+B+C=12& A+B=8
means together they are making 12 unit per day and in 10 days they will make 120 units from above we can find B=3 and C=4 and A=5 together they are making 12 units per day
so time taken by A = 120/5 =24 days

Like? Yes (17) | No (13)

Gouse Jani 7 years ago

B works three times as much as A. If B takes 20 days less than A to complete this work. In how many days will A and B together complete the work ?

Like? Yes (17) | No (5)

A SIRISHA 10 years ago

If A is thrice as good as a workman as B and so takes 60 days less than B for doing a job. find the time in which they can do it together ? with explanation

Reply Like? Yes | No

A SIRISHA 10 years ago

Rs . 78 is divided among 7 men ,11 women and 5 boys so that each women may have thrice as much as a boy and as much as a man and a boy together . Find the share of a man ? with expalnation.......

Reply Like? Yes | No

Devendra Marghade 10 years ago

21 Rs.

If each man, woman & boy has m, w & b Rs. respectively, then
7m+ 11w + 5b= 78 -----(i)
Given, w=3b & w=m+b
Substituting, w=3b in (i), 7m+38b= 78 ----(ii) &
w=m+b in (i), 18m+16b =78 ----(iii)
On solving, (i), (ii) & (iii), m=3, w=4.5, b=1.5
So Total share of a men=7*3= 21 Rs.

Like? Yes (2) | No

A SIRISHA 10 years ago

Reply Like? Yes (1) | No

A SIRISHA 10 years ago

A can do as much work as C in 2 days and C does in 3 days as much work as B in 4 days.what time B would require to do a work which A can finish in 16 weeks

Reply Like? Yes (6) | No

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