If A and B together can complete a piece of work in 15 days and B alone in 20 days, then in how many days can A alone complete the work?
- 30 days
- 60 days
- 20 days
- None of these
Explanation
A + B can do it in 15 daysB alone can do it in 20 days
1 day work:
A + B = 1/15
B = 1/20
A = 1/15 - 1/20 = (4-3)/60 = 1/60
A alone can do it in 60 days.
Last verified on 30-03-2026
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