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SSC Sample Paper SSC (Group-C) Sample Test Paper-10

  • question_answer
    A man walking at. 5 km/hour noticed that a 225m long train coming in the opposite direction crossed him in 9 seconds. The speed of the train is

    A)  75 km/hour    

    B)  80 kin/hour

    C)  85 km/hour

    D)       90 kin/hour

    Correct Answer: C

    Solution :

     Speed of train \[=x\text{ }kmph\] \[\therefore \] Relative speed \[=(x+5)\,kmph\] \[\therefore \] Relative speed             \[=\frac{Length\text{ }of\text{ }train}{Time\text{ }taken\text{ }in\text{ }crossing}\] \[\Rightarrow \]            \[x+5=90\] \[\Rightarrow \]            \[x=90-5=85\,kmph\]


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