Railways R.R.C. (Jabalpur) Solved Paper Held on 1st Shift 30-11-2014

  • question_answer B and C can complete a piece of work in 12 days, C and A can do it in 8 days. All the three can do it in 6 days. A and B together can complete it in?

    A) 8 days              

    B) 10 days

    C) 6 days              

    D) 4 days

    Correct Answer: A

    Solution :

    Work done by A and B together it 1 day \[=\frac{2}{6}-\left( \frac{1}{12}+\frac{1}{8} \right)\] \[=\frac{1}{3}-\frac{5}{24}\] \[=\frac{8-5}{24}=\frac{3}{24}=\frac{1}{8}\] Hence, A and B together can complete it in 8 days.

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