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SSC Sample Paper SSC CGL - Sample Paper-18

  • question_answer
    A cistern is normally filled in 8 h but takes 2 h longer to be filled because of a leak in the bottom. If the cistern is full, the leak will empty in

    A) 20 h                             

    B) 36 h

    C) 40 h                 

    D) None of these

    Correct Answer: C

    Solution :

    Let leak can empty the full tank in x h. Then,             \[\frac{1}{8}-\frac{1}{x}=\frac{1}{10}\] \[\therefore \]      \[\frac{1}{x}=\frac{1}{8}-\frac{1}{10}=\frac{1}{40}\] \[\therefore \]      \[x=40\]           


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