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Computer Science
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Time and Work
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?
7 hours 30 minutes
8 hours
8 hours 15 minutes
8 hours 25 minutes
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Correct Answer:
8 hours 15 minutes
Explanation:
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
∴ Time taken by both to type 110 pages =
❨
110 x
3
❩
hours
40
= 8
1
hours (or) 8 hours 15 minutes.
4
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