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A can do a piece of work in 12 days and B can do it in 18 days. They work together for 2 days and then A leaves. How long will B take to finish the remaining work ?
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- 6 days
- 8 days
- 10 days
- 13 days
Correct Option: D
(A+B)’s 2 days’ work
| = 2 |  | + |  | = | 12 | 18 | 36 |
Remaining work
| = 1 - | = | |||
| 36 | 36 |
| Time taken by B to complete | part of work | 36 |
| = | × 18 = 13 days | 36 |
Aliter : Using Rule 20,
Here, m = 12, n = 18, p = 2
Time taken by B
| = | m |
| = | 12 |
| = | = 13 days | 12 |
