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Railways RRB (Assistant Loco Pilot) Solved Paper-2013

  • question_answer
    A 130 m long train crosses a bridge m 30 seconds at 45 kmph. The length of the bridge is

    A)  200 m            

    B)  245 m

    C)  225 m            

    D)  250 m

    Correct Answer: B

    Solution :

     Speed\[=45\,\,kmph=45\times \frac{5}{18}=12.5\,\,m/s\] Let, length of the bridge\[=x\,\,m\]; then             \[\frac{130+x}{12.5}=30\] \[\Rightarrow \]   \[130+x=375\] \[\therefore \]      \[x=375-130=245\,\,m\].


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