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A and B together can do a piece of work in 12 days, while B alone can finish it in 30 days. A alone can finish the work in
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- 20 days
- 25 days
- 15 days
- 18 days
Correct Option: A
| A’s 1 day’s work = | - | 12 | 30 |
| A’s 1 day’s work = | ||
| 60 |
| A’s 1 day’s work = | = | 60 | 20 |
Hence, A alone will complete the work in 20 days.
Second method to solve this question ,
Here , x = 12 , y = 30
| Time taken By A = | ||
| x - y |
| Time taken By A = | ||
| 30 - 12 |
| Time taken By A = | = 20 days | |
| 18 |
