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    Question

    Working alone, B can complete the work in 16 days. C is

    twice as efficient as B and A takes 4 days more than it takes C to complete the work. Working together, in how much time would they be able to complete 13 such works?
    A 70 days Correct Answer Incorrect Answer
    B 48 days Correct Answer Incorrect Answer
    C 87 days Correct Answer Incorrect Answer
    D 63 days Correct Answer Incorrect Answer

    Solution

    Time taken by B to complete the work = 16 days Time taken by C to complete the work = 16/2 = 8 days Time taken by A to complete the work alone = 8 + 4 = 12 days Work done by A, B and C together in 1 day. тЗТ (1/16 + 1/8 + 1/12) = (3 + 6 + 4)/48 = 13/48 this means if would take 48/13 days for A, B and C to complete the work together тИ┤ Time taken A, B and C to complete 13 works = 13 ├Ч 48/13 days = 48 days

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