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    Question

    Pipes X and Y working together can fill an empty tank in

    15 hours. Z is an emptying pipe. If X, Y and Z together take 25% more time than what X and Y together take to fill the empty tank, then how long will Z alone take to empty the fully filled tank?
    A 64 hours Correct Answer Incorrect Answer
    B 70 hours Correct Answer Incorrect Answer
    C 72 hours Correct Answer Incorrect Answer
    D 75 hours Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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