Question

    Aman is twice as efficient as Suman. Both of them began

    working together, but Aman stopped after 12 days. Suman then finished the remaining work in 4 days. Determine the time it would take Aman to complete the entire work on his own.
    A 36 days Correct Answer Incorrect Answer
    B 20 days Correct Answer Incorrect Answer
    C 40 days Correct Answer Incorrect Answer
    D 24 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the efficiency of Suman be '1e' unit/day Efficiency of Aman = 2 X 1e = '2e' units/day Total work = (1e + 2e) X 12 + 4 X 1e = 36e + 4e = 40e units Therefore, required time = (40e/2e) = 20 days

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