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AMU Medical AMU Solved Paper-2015

  • question_answer
    A 130 m long train is moving in up direction with speed 17 km/h. Another train of 120 m long is moving in down direction with speed 108 km/h. The time in which second train crosses the first train will be

    A)  5s                                          

    B)  10s

    C)  12s                                       

    D)  15s

    Correct Answer: A

    Solution :

                    Total distance coverd by second train in crossing the first train = 250 m Velocity of second train w.r.t first train                 \[=20\,m/s+30m/s\]                 = 50 m/s \[\therefore \]  Time \[=\frac{Distance}{Velocity}\]                 \[=\frac{250}{50}=5\,\,s\]


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