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    Question

    An inlet pipe can fill a tank in 10 hours, whereas an

    outlet pipe can empty the same tank in 25 hours. Find the time taken by two such inlet pipes and one such outlet pipe to fill the tank completely if all the pipes are opened together.
    A 6.25 hrs Correct Answer Incorrect Answer
    B 2.25 hrs Correct Answer Incorrect Answer
    C 5 hrs Correct Answer Incorrect Answer
    D 12.2 hrs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the total capacity of the tank be 50 units (LCM of 10 and 25). Required time = 50/(10-2) = 50/8 = 6.25 hrs

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