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SSC Sample Paper Mock Test-2 SSC CGL Tear-II Paper-1

  • question_answer
    The pipes A and B can fill a tank in 36 min and 45 min, respectively. A waste pipe C can empty the tank in 30 min. First A and B are opened. In how much time the tank is full?

    A)  60 min

    B)  90 min

    C)  115 min                       

    D)  None of these

    Correct Answer: A

    Solution :

    Part filled by pipe A in 1 min \[=\frac{1}{36}\] Part filled by pipe B in 1 min \[=\frac{1}{45}\] \[\therefore \]Total water dropped in the tank in 1min \[=\frac{1}{36}+\frac{1}{45}\] Water leaked out in 1 min by C \[=\frac{1}{30}\] \[\therefore \]Total tank filled in min \[=\frac{1}{45}+\frac{1}{36}-\frac{1}{30}=\frac{4+5-6}{180}=\frac{1}{60}\] Hence, the tank will be filled in 60 min.                        


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