Question

Reemu read 1/5th pages of a book. if she reads further 40 pages, she would have read 7 /10 th pages of the book. How many pages are left to be read?

Answer 1

1/5=2/10
|2/10-7/10|=5/10=1/2
now
5/10x=40
x=80
pages left
4/5×80
=64

Answer 2

Thank you for asking this question. Here is your answer:

First we will assume the pages in the book be x

2/3 of x + 40 = 7/10 of x

2x/3 + 40 = 7x / 10

7x /10 - 2x/3 = 40

21x 20x / 30 = 40

x / 30 = 40

x = 1200

1200 × 7/10 = 840 pages are read

and 1200 - 840 = 360

So this means there are 360 pages left to be read.

If there is any confusion please leave a comment below.