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    Question

    Pipe A and B fill a tank in 43.2minutes and 108minutes

    respectively, Pipe C can empty it at 3 liters /minutes. When all the three pipes are opened together, they will fill the tank in 54 minutes. The capacity (in liters) of the tank is.
    A 146 Correct Answer Incorrect Answer
    B 216 Correct Answer Incorrect Answer
    C 108 Correct Answer Incorrect Answer
    D 156 Correct Answer Incorrect Answer

    Solution

    A B A+B+C-C 43.2 108 54 216 5243 Efficiency of C=4-(5+2) = -3 C empty 3 units in 1 min – We have C can empty 3liters in 1 min. Therefore, capacity of tank = 216×1=216 liters.

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