A alone can finish a piece of work in 12 days and B alone can do it in 15 days how much time will be taken if both a and b work together
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Answer:
3/20 days
Step-by-step explanation:
No. of days taken by A to do the work= 12
No. of days taken by B to do the work= 15
A's one day's work = 1/12
B's one day's work = 1/15
therefore A and B together will take = 1/12 + 1/15
= 9/60= 3/20 days
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