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    Question

    A and B together can complete a piece of work in 10

    days. A alone can complete it in 15 days. In how many days can B alone complete the work?
    A 30 days Correct Answer Incorrect Answer
    B 22 days Correct Answer Incorrect Answer
    C 45 days Correct Answer Incorrect Answer
    D 27 days Correct Answer Incorrect Answer

    Solution

    (A + B)тАЩs 1-day work = 1/10 AтАЩs 1-day work = 1/15 BтАЩs 1-day work = 1/10 тИТ 1/15 = (3 тИТ 2) / 30 = 1/30 So B alone will take 30 days. Answer: 30 days

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