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    Question

    Pipe E can fill a pool in 24 hours and pipe F in 48

    hours. If both the pipes are opened in an empty pool, how much time will they take to fill it?
    A 14 hours Correct Answer Incorrect Answer
    B 18 hours Correct Answer Incorrect Answer
    C 10 hours Correct Answer Incorrect Answer
    D 16 hours Correct Answer Incorrect Answer

    Solution

    Let the capacity of tank be 96 litres (LCM of 24 and 48) Efficiency of 'E' = (96/24) = 4 litres/hour Efficiency of 'F' = (96/48) = 2 litres/hour Required time = 96 ÷ (4 + 2) = 16 hours

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