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Time and Work

Q1: Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?

A 7 hours 30 minutes

B 8 hours

C 8 hours 15 minutes

D 8 hours 25 minutes

ANS:C - 8 hours 15 minutes

Number of pages typed by Ravi in 1 hour = 32 = 16 .
6 3
Number of pages typed by Kumar in 1 hour = 40 = 8.
5
Number of pages typed by both in 1 hour = ( 16 + 8 ) = 40 .
3 3
Therefore Time taken by both to type 110 pages = ( 110 x 3 ) hours
40
= 8 1 hours (or) 8 hours 15 minutes.
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