A can finish a piece of work in 12 days while B can do it in 15 days. If both work at it together, what time will they take to do the work?

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Accepted Answer

Efficiency of A = 100/12 = 8.33% Efficiency of B = 100/15 = 6.66% Combined efficiency of A and B = 8.33 + 6.66 = 15% Number of days taken by A and B, when worked together = 100/15 = 62/3 days

A can finish a piece of work in 12 days while B can do it in 15 days. If both work at it together, what time will they take to do the work?

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