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    Question

    A can do a piece of work in 40 days. A is 25% more

    eicient than B. In how many days the work gets completed when both of them work together?
    A 200/11 days Correct Answer Incorrect Answer
    B 130/8 days Correct Answer Incorrect Answer
    C 200/9 days Correct Answer Incorrect Answer
    D 160/7 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Efficiency of A = 1/40 Efficiency of B = (1/40) ├Ч (1/1.25) = 1/50 Time taken by B to complete the work = 50 days Let the total amount of work = 200 units Amount of the work done by A in one day = 200/40 = 5 units Amount of the work done by B in one day = 200/50 = 4 units Time taken by both to complete the work = (200/9) days

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