Question

If the price of the book is reduced by rupees 5 and a person can buy 4 more books for 600. find the original price of the book ?

Answer 1

let no. of books be n

let price of a book be x

therefore, nx=300…………………………….(1)

now price reduced by 5 and number of books increased by 5

(x-5)(n+5)=300…………………………………..(2)

on solving we get

x=20

n=15……………………………….(answer)

Answer 2

Let's assume, original price = X

Reduced by 5 comes to X-5

Now, at price (X-5), he can buy 6 books and spend entire 300 he had.

The equation becomes -

(X-5) *6 =300

X-5= 300/6

X=50+5

Original price is 55.