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    Question

    A woman is one-third as efficient as a man. How much time

    will 9 women take to complete a job that is 75% of the work done by 10 men in 12 days?
    A 30 days Correct Answer Incorrect Answer
    B 20 days Correct Answer Incorrect Answer
    C 35 days Correct Answer Incorrect Answer
    D 40 days Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the efficiency of each man be 3x units/day

    So, total work = 3x × 10 × 12 = 360x units

    And efficiency of a woman = 3x ÷ 3 = x units/day

    So, required time = (360x × 0.75) ÷ (9 × x) = 30 days

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