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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-30

  • question_answer
    A 320 m long train moving with a average speed of 120 km/h crosses a platform in 24 s. A man crosses the same platform in 4 min. What is the speed of man in m/s?

    A)  2                    

    B)  1.5

    C)  1.6      

    D)  2.6

    Correct Answer: A

    Solution :

    Speed of the train = 120 km/h \[=120\times \frac{5}{18}m/s=\frac{100}{3}m/s\] Suppose the length of the platform = x m Then,   \[\frac{x+320}{\frac{100}{3}}=24\] \[\Rightarrow \]   \[3(x+320)=100\times 24\] \[\Rightarrow \]   \[x+320=800\] \[\Rightarrow \]\[x=800-320=480\] Hence, speed of a man \[=\frac{480}{4\times 60}\,\,m\text{/}s=2\,\,m\text{/}s\]


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