Question
A can complete a piece of work in 12 days and B can
complete the same work in 18 days. In how many days can they together complete 5/6 of the work?Solution
A's 1-day work = 1/12 B's 1-day work = 1/18 Together 1-day work = 1/12 + 1/18 = 3/36 + 2/36 = 5/36 Time to complete 5/6 of work: = (5/6) / (5/36) = (5/6) x (36/5) = 6 days Hence, the correct answer is 6 days.
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Question Figure:
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