Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-28

  • question_answer
    A can do a piece of work in 25 days which 8 alone can finish in 20 days. Both together work for 5 days and then A leaves off. How many days will B take to finish the remaining work?

    A)  11                   

    B)  12  

    C)  13                   

    D)  14

    Correct Answer: A

    Solution :

    (A + B)?s 5 day?s work\[=5\left[ \frac{1}{25}+\frac{1}{20} \right]\] \[=\left[ 5\times \frac{9}{100} \right]=\frac{9}{20}\] Remaining work as \[=\left[ 1-\frac{9}{20} \right]=\frac{11}{20}\] 1/20 work is done by B in 1 day. 11/20 work is done by B in \[1\times 20\times \frac{11}{20}\]days= 11 days

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