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Raja can do a piece of work in 20 days while Ramesh can finish it in 25 days. Ramesh started working and Raja joined him after 10 days. The whole work is completed in
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- 18 days
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16 2 days 3 - 20 days
- 15 days
Correct Option: B
Work done by Raja and Ramesh in 1 day
| = | + | = | = | |||||
| 20 | 25 | 100 | 100 |
Work done by Ramesh in 10 days
| = | = | |||
| 25 | 5 |
| Remaining work = 1 – | = | |||
| 5 | 5 |
∴ This part is done by Raja and Ramesh.
∴ Time taken
| = | × | = | = 6 | days. | ||||
| 5 | 9 | 3 | 3 |
∴ Required time
| = 10 + 6 | = 16 | days | ||
| 3 | 3 |
