Question

12. The cost of 63 erasers is 315. What will be the cost of 45 erasers?​

Answer 1

as given in the question we have given that co

cost of 63 eraser =315

we need to find cost of 45 eraser

simply we can use

63=315

the value of 1 eraser =x

hence

63=315

1   = x

by cross multiplication we get the value of x

$63=315\\1 = x$

$63x=315\\x=\frac{315}{63}$

$x=5$

so this is the value of one eraser hence

45 eraser=$45*x\\45 *5\\=225$

so finally the cost of 45 eraser =225

Answer 2

As per the data given in the question,

We have to determine the value of 45 erasers.

As per question,

It is given that,

Cost of 63 erasers is 315.

So, for getting the value of cost of 1 erasers we need to divide the cost of 63 erasers by 63.

Hence, the value of cost of 1 erasers will be $=\frac{315}{63} = Rs.\:5$

Hence, for finding the value of cost of 45 erasers we need to multiply the cost of 1 eraser by 45.

So, we will get the cost of 45 erasers will be

$=(45 \times 5) = Rs.\:225$

Hence, cost of 45 erasers will be Rs. 225.