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    Question

    Tap P can fill the tank in 5 hours and Tap Q can empty

    it in 7(1/2) hours. Tap P starts filling and they opened for 1 hour each alternatively. In what time will the tank be full?
    A 12*1/2 hours Correct Answer Incorrect Answer
    B 30 hours Correct Answer Incorrect Answer
    C 25 hours Correct Answer Incorrect Answer
    D 22 hours Correct Answer Incorrect Answer
    E 15 hours Correct Answer Incorrect Answer

    Solution

    2 Hours = 1 work done         Last work will be done by P Therefore, 15 -3 = 12

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