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A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the job ?
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- 50 days
- 60 days
- 48 days
- 54 days
Correct Option: B
| (A+B)’s 1 day’s work = | 30 |
| (A + B)’s 20 day’s work = | = | |||
| 30 | 3 |
| Remaining work = 1 - | = | |||
| 3 | 3 |
| Now | part of work is done by A in 20 days | 3 |
∴ Whole work will be done by A alone in 20 × 3 = 60 days.
