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    Question

    P’s 4 days work is equal to Q’s 5 days work. If P

    and Q together can complete the work in 25 days then how much time Q will take to complete 40% of the work?
    A 16 days Correct Answer Incorrect Answer
    B 35 days Correct Answer Incorrect Answer
    C 22.5 days Correct Answer Incorrect Answer
    D 20 days Correct Answer Incorrect Answer

    Solution

    Ratio of efficiency of P and Q = 5:4 Let the efficiency of P and Q be 5x and 4x units per day respectively. Total work = 9x × 25 = 225x units Required time = (0.40 × 225x)/4x = 22.5 days

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