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    Question

    A train travelling with a speed of 54 km/h can cross a

    pole in 6 seconds. Find the time taken by the train to cross a 180 metres long platform if the speed of train is increased by 20%.
    A 16 seconds Correct Answer Incorrect Answer
    B 15 seconds Correct Answer Incorrect Answer
    C 22.5 seconds Correct Answer Incorrect Answer
    D 14 seconds Correct Answer Incorrect Answer

    Solution

    Speed of train = 54 × 5/18 = 15 m/s Length of train = 15 × 6 = 90 metres Desired time = (90 + 180)/(1.20 × 15) = 15 seconds

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