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Railways R.R.C. (Guwahati) Solved Paper Held on 24-11-2013

  • question_answer
    X can complete a piece of work in 30 hours and Y can do it in 24 hours. In how many hours will it be completed if they work together

    A) 13 ? 33 hours    

    B) 14 ? 33 hours

    C) 15 ? 33 hours    

    D) 16 ? 33 hours

    Correct Answer: A

    Solution :

    Number of hours spent to complete the work \[=\frac{30\times 24}{30+24}\] \[=\frac{720}{54}hrs\] \[=13.33\,\,hrs\]


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