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BCECE Medical BCECE Medical Solved Papers-2009

  • question_answer
    A 150 m long train is travelling from east to west at a speed of 20 \[m{{s}^{-1}}\]. A bird is flying from west to east at a speed of 5 \[m{{s}^{-1}}\]. How long will the bird take to cross the train?

    A)  6s              

    B)  7.5 s

    C)  10 s             

    D)  30 s

    Correct Answer: A

    Solution :

    Relative velocity of bird with respect to train                 \[=4-(20)=5+20=25\,m{{s}^{-1}}\] Time taken by bird \[=\frac{d}{{{v}_{rel}}}=\frac{150}{25}=6\,\,s\]


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