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BCECE Engineering BCECE Engineering Solved Paper-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 wilt the bird take to cross the train?

    A)  6 s                         

    B)         7.5 s                     

    C)  10 s                      

    D)         30 s

    Correct Answer: A

    Solution :

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


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