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SSC Sample Paper SSC CGL - Sample Paper-15

  • question_answer
    A cistern which could be filled in 9 h takes one hour more to be filled owing to a leak in the bottom. If the cistern is full, leak will empty it in time (in hours)

    A) 60                                

    B) 84       

    C) 90                    

    D) 86

    Correct Answer: C

    Solution :

    Let leak can empty the full tank in x h Due to leak, cistern is filled in \[9+1=10\,h\] \[\therefore \]      \[\frac{1}{9}-\frac{1}{x}=\frac{1}{10}\] \[\therefore \]      \[\frac{1}{x}=\frac{1}{9}-\frac{1}{10}=\frac{1}{90}x=90\]      


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