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    Question

    Train тАШAтАЩ travelling with a speed of 80 km/h can

    cross a pole in 9 seconds. If the length of train тАШBтАЩ is 20% less than that of train тАШAтАЩ and it can cross a pole in 16 seconds then speed (in km/h) of train тАШBтАЩ is:
    A 32 km/h Correct Answer Incorrect Answer
    B 30 km/h Correct Answer Incorrect Answer
    C 35 km/h Correct Answer Incorrect Answer
    D 36 km/h Correct Answer Incorrect Answer

    Solution

    Speed of train тАШAтАЩ = 80 ├Ч (5/18) = (200/9) m/s Length of train тАШAтАЩ = (200/9) ├Ч 9 = 200 metres Length of train тАШBтАЩ = 0.8 ├Ч 200 = 160 metres Speed of train тАШBтАЩ = (160/18) ├Ч (18/5) = 32 km/h

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