If A completes a work in 12 days and B completes it in 18 days, how many days will they take together?
- 7.2 days
- 8 days
- 9 days
- None of these
Explanation
A’s 1 day work = 1/12
B’s 1 day work = 1/18
Combined work = 1/12 + 1/18
= (3 + 2) / 36 = 5/36
Time taken = 1 ÷ (5/36) = 36/5 = 7.2 days
Last verified on 10-05-2026
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