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    Question

    The ratio of the rate of filling of two taps A and B is

    3:2, respectively. If working together they can fill 3/4 of a tank in 18 minutes, how long will tap A alone take to fill the tank?
    A 20 minutes Correct Answer Incorrect Answer
    B 40 minutes Correct Answer Incorrect Answer
    C 25 minutes Correct Answer Incorrect Answer
    D 60 minutes Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the rate of filling of taps A and B be тАШ3aтАЩ units per minute and тАШ2aтАЩ units per minute, respectively. Total capacity of tank = 24 ├Ч (3a + 2a) = 24 ├Ч 5a = 120a units Required time taken by tap A = 120a/3a = 40 minutes

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