Question: 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
8 hours
8 hours 15 minutes
8 hours 25 minutes
[A].
[B].
[C].
[D].
Answer: Option C
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 |