- A 12
- B 16
- C 20
- D 22
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Answer:
A
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The combined work rate of A and B is 1/6 of the task per day, and they work together for 2 days,
completing 1/3 of the task.
The remaining work is 2/3 of the task, and A's work rate is 1/15 of the task per day.
Therefore, it will take A 10 days to complete the remaining work.
The total time taken for the task to be completed is 10 days + 2 days = 12 days
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