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Arithmetic Ability
Decimal Fractions

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Q.

Karthik read 6/13 th of a book in 1st week and 5/9 th of the remaining book in 2nd week. If there were 100 pages unread after 2nd week, how many pages were there in the book ?

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Correct choice: C

Explanation:

Let the total book be 1 Then, in the 1st week 6/13 th of book is read i.e remaining pages = 1−6/13=7/13 in 2nd week he read 59 th of it i.e 5/9×7/13=35/117 Remaining pages after 2nd week = 7/13−35/117=28/117 But given remaining pages after 2nd week = 100 28x/117=100 --> x = 418 The total pages in the book are 418
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