Question

A and B?
A and B can do a piece of work in 18 days; B and C can do it in 24 days while C and A can
finish it in 36 days. In how many days can A, B, C finish it, if they all work together?
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Answer 1

Answer:

1. A and B together can complete a piece of work in 18 days, B and C in 24 days and A and C in 36 days. In how many days, will all of them together complete the work? ∴ A, B and C together will complete the work in 16 days. Hence option [D] is correct answer.