3. A alone can do a piece of work in 12 days and B alone can do it in 15 days
find the time taken (in days) when both A and B work together. *
O 7.21
01.01
O 6.66
O 14.05
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Answer:
The answer is 6.66 days.
Work done by A in 1 day = 1/12
Work done by B ib 1 day = 1/15
Total work done in 1 day = 1/12 + 1/15 = 9/60=3/20
Time taken to do all the work = 20/3 (reciprocal) = 6.66
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