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Railways Sample Paper RRB (Assistant Loco Pilot & Technician) Sample Test Paper-10

  • question_answer
    A and B together can complete a work in 10 days. A alone can complete it in 16 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work?

    A)  \[\frac{9}{40}\]                                    

    B)  \[\frac{7}{40}\]

    C)  \[\frac{5}{40}\]            

    D)       None of these

    Correct Answer: A

    Solution :

     B's 1 day's work \[=\frac{1}{10}+\frac{1}{16}=\frac{13}{80}\] Now, (A + B)'s 1 day's work\[=\frac{1}{16}+\frac{13}{80}=\frac{18}{80}=\frac{9}{40}\]  [B works for half day only] So, A and B together will complete the work in \[\frac{9}{40}\]days.


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