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Railways Sample Paper RRB (Group D) Sample Test Paper-1

  • question_answer
    A train, 300 m long, passed a man, walking along the line in the same direction at the rate of 3 km/hr in 33 seconds. The speed of the train is

    A)  30 km/hr          

    B)  32 km/hr

    C)  \[32\frac{8}{11}\,\,Km/hr\]

    D)  \[35\frac{8}{11}\,\,Km/hr\]

    Correct Answer: D

    Solution :

    [d] If the speed of the train be x kmph, then relative speed \[=(x-\,3)\,kmph.\] \[=(x-\,3)\times \frac{5}{8}m/\sec \] \[\therefore \frac{300}{(x-\,3)\times \frac{5}{18}}=33\] \[\Rightarrow 5400=33\times 5\,\,(x-3)\] \[\Rightarrow 360=11\,\,(x-3)\] \[\Rightarrow 11x-\,33=360\] \[\Rightarrow x=\frac{393}{11}=35\frac{8}{11}kmph\]


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