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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-1

  • question_answer
    A and B take part in a 100 m race. A runs at 5 km/h. If A starts after 8 runs 8 m, and wins the race by 8 s, the speed of 8 is

    A)  4.15 km/h        

    B)  4.14 km/h

    C)  4.25 km/h        

    D)  4.41 km/h

    Correct Answer: B

    Solution :

    Speed of A = 5km/h \[\,=5\times \frac{5}{18}=\frac{25}{18}m/s\] Time taken by A to cover \[100\,\,m=\frac{100}{25}\times 18=72s\] To cover 100 ? 8 = 92 m, B takes 72 + 8 = 80 s. \[\therefore \] Speed of B \[=\frac{92}{80}\times \frac{18}{5}\] = 4.14 km/h


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