Question

After reading 1/5 of the book 80 pages are left how many pages are in book

Answer 1

After reading 1/5 of the book, 80 pages are left
So, 80 pages  = 4/5 of the book (Unread part = 1 -(1/5))
Let the book have x pages
 ⇒ 80 = $\frac{4x}{5}$
 ⇒ 80×5 = 4x
⇒ 400/4 = x
⇒ x = 100
∴The book has 100 pages

Answer 2

Given:

• After reading 1/5 of a book, 80 pages are left.

To Find:

• Number of pages in the book ?

Solution:

Let, the total number of pages in the book "x".

According to question,

➜ 1 - 1/5x = 80

➜ 4x/5 = 80

➜ 4x = 80 × 5

➜ x = 400/4

➜ x = 100

Hence, the total number of pages in the book is 100.

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