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A can do a piece of work in 60 days. He works for 15 days and then B alone finishes the remaining work in 30 days. The two together can finish the work in
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- 24 days
- 25 days
- 30 days
- 32 days
Correct Option: A
Work done by A in 15 days
| = | × 15 = | |||
| 60 | 4 |
Remaining work
| = |  | 1 - |  | = | ||
| 4 | 4 |
Now, 3/4 work is done by B in 30 days
Whole work will be done by B in
| = | = 40 days | 3 |
| A’s 1 day’s work = | and B’s 1 day’s work | 60 |
| = | 40 |
(A + B)’s 1 day’s work
| = | + | = | = | |||||
| 60 | 40 | 120 | 24 |
Hence, both will finish the work in 24 days
