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A and B together can finish a work in 30 days. They worked on it for 20 days and then B left the work. The remaining work was done by A alone in 20 days more. In how many days can A alone finish the work?
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- 48 days
- 50 days
- 54 days
- 60 days
Correct Option: D
| ∴ (A + B)’s 20 days’ work = | |
| 30 |
| (A + B)’s 1 day’s work = | = | ||
| 30 | 3 |
| Remaining work = 1 – | = | ||
| 3 | 3 |
| Time taken by A in doing = | of work = 20 days | |
| 3 |
∴ Time taken by A in doing whole work = 3 × 20 = 60 days
