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SSC Sample Paper SSC CGL - Sample Paper-24

  • question_answer
    A train of length 150 m takes 10 s to cross another train 100 m long coming from the opposite direction. If the speed of first train is 30 km/h. What is the speed of second train?

    A) 72 km/h            

    B) 60 km/h

    C) 54 km/h            

    D) 48 km/h

    Correct Answer: B

    Solution :

    Time taken to cross the trains \[=\frac{150+100}{\frac{25}{3}+x}\] where x is the speed of second train. \[\Rightarrow \]   \[10=\frac{250\times 3}{25+3x}\] \[\Rightarrow \]   \[250+30x=750\] \[\Rightarrow \]   \[30x=500\] \[\Rightarrow \]   \[x=\frac{50}{3}m/s\] \[\therefore \]      \[x=\frac{50}{3}\times \frac{18}{5}\]             \[=60\,\text{km/h}\]


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