The total cost of 10 copies and 5 pens is 125 rupee. It is given that the cost (per unit) of two art

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27 Sep 2011 cost

The total cost of 10 copies and 5 pens is 125 rupee. It is given that the cost (per unit) of two articles are 2 successive integers. Total cost of 1 copy and 1 pen is

OPtion

1) 10
2) 11
3) 12
4) 13
5) 14
6) 15
7) 16
8) 17
9) 18
10) 19

Solution

According to the given condition
either 10x+5(x+1)=125
or 10(x+1)+5x=125
in one of the two cases x is not integer, so solve the other x=8
so answer = 8+9 = 17

Correct Option: 8 Best Solution (20)

Balakumaran N.A   12 years AGO

given that, 10x+5y=125; and also successive integer.
Let us assume that, 8 and 9 (two successive int)
then, 80+45=125(satisfied). so, x=8 and y=9 gives that, 17 as answer.

Like? Yes (7) | No (1)  

Amit Nathani   12 years AGO

let cost of copy per unit=x
10X+5(x+1)=125
x=8
so toatal cost per unit=8+9=17

Like? Yes (2) | No   

Ankit   12 years AGO

let the cost is x for copies and x+1 for pen
10x+5(x+1)=125
15x=120
x=8
so cost are 8 and 9
ans= 8+9=17

Like? Yes (2) | No   

sharman kumar   12 years AGO

it's given that two articles price er unit is successive intgers.... so let rices are x and x+1

therefore 10x+5(x+1)=125......A or
10(x+1)+5x=125......B

BY eqn. A x=8 & B=7.66(not a intger)
so the total cost of 1 coy & 1 pen is 8+9=17

Like? Yes (2) | No   

Datla Kanthi   12 years AGO

Cost of 1 pen is 9 and copy is 8 so their sum is 9+8=17

Like? Yes (1) | No   

Soumya Parhi   12 years AGO

given cost per unit is succesive integer. and 10 copies n 5 pens total cost is 125
Let per copy unit price=x n per pen unit price=y;
i.e 10x+5y=125
as x and y are consecutive integers.
so by trial n error method we can get x=8 n y=9
I.e per copy cost is 8 and per pen cost is 9.
So the total cost of 1 copy and 1 pen is =8+9=17.

Like? Yes (1) | No   

saurav kumar sinha   12 years AGO

let cost of 1 copy is X
therefore cost of 1 pen is (X+1)
now total cost = 10X + 5(X+1) i.e 125
=> 10X + 5(X+1) = 125
=> X = 8
so cost of 1 copy = Rs.8
and cost of 1 pen = Rs.9
So required total cost = Rs.17

Like? Yes (1) | No   

ANUJ MAURYA   12 years AGO

the cost of copy=8 rs
and the cost of pen=9 rs(10*8)+(5*9)=125
and so cost of i copy and 1 pen= 8+9=17 Ans

Like? Yes (1) | No   

srilatha   12 years AGO

given that 10c+5p=125
and also given tat 2articles cost successive 2 int
then (8,9)are 2 successive integers satisfies the above equation
then the total cost of 1copy+1pen=8+9=17

Like? Yes (1) | No   

ravikant yadav   12 years AGO

let two succesive no be x and x+1.
hence 10 copies and 5 pens cost is 125
let the cost of 1 copy be x rs and pen is x+1 rs.
10x+5(x+1)=125
10x+5x+5=125
15x=120;
x=8;
1 copy (x)=8rs.
1 pen (x+1)=9rs.
hence= total amount is 17 Rs.

Like? Yes (1) | No   

lalitha   12 years AGO

given that 10c+5p=125
and 2articles cost successive 2 int
then 8,9 are 2 successive integers satisfies the above equation
then the total cost of 1copy+1pen=8+9=17

Like? Yes (1) | No   

priya yadav   12 years AGO

17=9+8
10 COPIES = 80(1 COPY= 8RS)
5 PENS = 45(1 PEN = 9 RS)
TOTAL OF 10 COPIES AND 5 PENS = 125

Like? Yes (1) | No   

Joy   12 years AGO

10X + 5(X+1)= 125
=> X=8 and X+1 =9

Like? Yes (1) | No   

Prashul Maheshwari   12 years AGO

8 rupees per copy
then 10 copies cost= 8*10= 80
9 rupees per pen
so cost of 5 pens= 9*5= 45
so total cost= 125
Hence total cost of 1 copy and 1 pen= 8+9= 17

Like? Yes (1) | No   

vignesh   12 years AGO

10x+5(x+1)=125
x=8
x+1=9
total 17

Like? Yes (1) | No   

Vishal Mehta   12 years AGO

cost per copy=8
so cost of 10 copies= 8*10= 80
cost per pen=9
cost of 5 pens= 9*5= 45
hence total cost of 1 pen and 1 copy= 8+9= 17

Like? Yes (1) | No   

Nishant    12 years AGO

given:
10x+5y=125
so, 2x+y=25
a/q x and y are having two successive integer value
possible answer is only (8,9)=(x,y)
so,x+y=8+9=17

Like? Yes (1) | No   

amit kumar   12 years AGO

10x+5(x+1)=125
15x+5=125
15x=120
x=8
x+1=9
total=17

Like? Yes (1) | No   

dharmil   12 years AGO

17.
according to condition.
1 copy- 8 RS.
1 pen-9 RS.

Like? Yes (1) | No   

Gunaseelan   12 years AGO

10x+5y=125
putting x=8 and y =9 solves the equation

Like? Yes (1) | No