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SSC Sample Paper SSC CGL - Sample Paper-11

  • question_answer
    Two pipes A and B can fill a tank in 20 min and 30 min respectively. If both pipes are opened together, the time taken to fill the tank is

    A) 50 min             

    B) 12 min   

    C) 25 min             

    D) 15 min

    Correct Answer: B

    Solution :

    Required time\[=\frac{1}{\begin{matrix}    1  \\    20  \\ \end{matrix}+\begin{matrix}    1  \\    30  \\ \end{matrix}}=\frac{20\times 30}{50}=12\min \]


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