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A man reads 3/7 of a book on a day and 2/5 of the remaining, on the second day. If the number of pages still unread are 36, how many pages did the book contain ?

Correct Answer: 105

Explanation:

Let number of pages in a book = p


According to questions


p - [3p/7 + (2/5 x 4p/7)] = 36


= p - 23p/35 = 36


=> 12p = 36 × 35


p = 105


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