A can do a piece of work in 18 days and B can do same work in 24

days. In how many days can they complete it? If they do it together.

# A can do a piece of work in 18 days and B can do same work in 24

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Answer: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

i think so that the answer is

21 days