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SSC Sample Paper SSC CGL - Sample Paper-24

  • question_answer
    Two trains each 200 m long move towards each other on parallel lines with velocities 20 km/h and 30 km/h respectively. What is the time that elapses when they first meet until they have cleared each other?

    A) 20 s                             

    B) 24.8 s    

    C) 28.8 s   

    D) 30 s

    Correct Answer: C

    Solution :

    Relative speed of trains \[=(20+30)\,\text{km/h}\] \[=\frac{50\times 5}{18}\text{m/s}\] Total relative distance \[=20+200=400\,m\] \[\therefore \]      Required time \[=\frac{400\times 18}{50\times 5}=28.8\,s\]          


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