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    Question

    Pipe A alone fill the tank in x hours and Pipe B alone fill the tank in (x – 6) hours. If the efficiency of pipe B is double of pipe A and pipe A fill the tank is 40 liters per hour, then what is the capacity of the tank?

    A 480 liters Correct Answer Incorrect Answer
    B 360 liters Correct Answer Incorrect Answer
    C 525 liters Correct Answer Incorrect Answer
    D 300 liters Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Pipe A alone fill 40 liters per hour, so Pipe B alone fill 80 liters per hour. Capacity of the tank = T => T/40 – T/80 = x – (x – 6) => 2T – T = 480 => T = 480 liters

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