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    Question

    A completes`5/10` of work in 12 days, then he completes

    the remaining work with the help of B in 5 days. The time required for A and B together to complete the entire work is
    A 7 days Correct Answer Incorrect Answer
    B 16 2/3 days Correct Answer Incorrect Answer
    C 10 days Correct Answer Incorrect Answer
    D 3 1/3 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    A will do `5/10` of work in 12 days A’s 1 day work = `5/(10xx12)` part A + B will do `5/10` part of work in 5 days A + B’s 1 day work`5/(10xx5)` part A + B = `5/50` in 1 day A + B = 1 work =`50/5` days =`10` days

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