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Railways R.R.C. (Ahmedabad) Solved Paper Held on 1st Shift 9-11-2014

  • question_answer
    Pipe A can fill an empty tank in 5 hours, while pipe B can empty the full tank in 6 hours. If both are opened in empty tank, time taken to fill it up completely is-

    A) 30 hrs.  

    B) 20 hrs.

    C) 10 hrs.              

    D) 40 hrs.

    Correct Answer: A

    Solution :

    Required time\[=\frac{6\times 5}{6-5}=\]30hrs.


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