Question

after eating 7 upon 9 of a book 40 pages are left how many pages are there in the book​

Answer 1

$\huge\red{\boxed{HELLO\:MATE}}$

Let us take the total pages of the book be x .

Fraction of book read = 7/9.= 7x/9

Part of book left = x - 7x/9 = 9x - 7x / 9 = 2x/9.

Number of pages left = 40.

So, Atq, 2x/9 = 40.

or x = 40 × 9 /2.

Therefore x = 180.

Therefore thee were 180 pages in the book.