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    Question

    A pipe fills a tank in 10 hours. A leak empties it in 15

    hours. If both are open, how long to fill the tank?
    A 30 hrs Correct Answer Incorrect Answer
    B 20 hrs Correct Answer Incorrect Answer
    C 40 hrs Correct Answer Incorrect Answer
    D 10 hrs Correct Answer Incorrect Answer

    Solution

    ATQ, Net rate = 1/10 тИТ 1/15 = (3тИТ2)/30 = 1/30 Time = 30 hours

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