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JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank Uniform Motion

  • question_answer
    A 100 m long train is moving with a uniform velocity of 45 km/hr. The time taken by the train to cross a bridge of length 1 km is                          [BHU 2004]

    A)                      58 s                    

    B)                     68 s            

    C)                     78 s                     

    D)                    88 s            

    Correct Answer: D

    Solution :

                          Length of train = 100 m Velocity of train\[=45\ km/hr=45\times \frac{5}{18}=12.5\ m/s\] Length of bridge = 1 km = 1000 m \Total length covered by train = 1100 m             Time taken by train to cross the bridge \[=\frac{1100}{12.5}\]= 88 sec


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