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    Question

    A train travelling with a speed of 108 km/h can cross a

    pole in 5 seconds. Find the time taken by the train to cross a 210 metres long platform if the speed of train is increased by 20%.
    A 15 seconds Correct Answer Incorrect Answer
    B 22.5 seconds Correct Answer Incorrect Answer
    C 14 seconds Correct Answer Incorrect Answer
    D 10 seconds Correct Answer Incorrect Answer

    Solution

    Speed of train = 108 × 5/18 = 30 m/s Length of train = 30 × 5 = 150 metres Desired time = (210 + 150)/(1.20 × 30) = 10 seconds

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