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Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-11

  • question_answer
    A alone can do a piece of work in 12 days and B alone in 15 days. A and B undertook to do it for Rs.6400. With the help of C, they completed the work in 6 dyas. How much is to be paid to C?

    A)  540                             

    B)  640

    C)  750                 

    D)       650

    Correct Answer: B

    Solution :

     Cs 1 day's work             \[=\frac{1}{6}\,\,\frac{1}{12}+\frac{1}{15}=\frac{1}{16}\,\,\frac{9}{60}=\frac{1}{60}\] A's wages : B's wages : C's wages             \[=\frac{1}{12}:\frac{1}{15}:\frac{1}{60}=5:4:1.\] Cs share = Rs. \[\frac{1}{10}\times 6400=\] Rs.640


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