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    Question

    Ratio of the work done by P, Q and R in one day is 7:5:9

    respectively. They all together can complete the work in 35 days. Q and R worked on it for 21 days. In how many days P will complete the remaining work.
    A 54 days Correct Answer Incorrect Answer
    B 63 days Correct Answer Incorrect Answer
    C 88 days Correct Answer Incorrect Answer
    D 78 days Correct Answer Incorrect Answer

    Solution

    Let total amount work be = 35 x 21 = 735 units Amount of work done by Q and R in 21 days = 21 x 14 = 294 units Amount of work left = 735 – 294 = 441 Required time = 441/7 = 63 days

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