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    Question

    A 600-metre-long train takes 24 seconds to cross a pole.

    Due to a technical issue, its speed is reduced by 20%. Find the time taken by the train to cross a platform of length 900 metres.
    A 60 seconds Correct Answer Incorrect Answer
    B 70 seconds Correct Answer Incorrect Answer
    C 75 seconds Correct Answer Incorrect Answer
    D 80 seconds Correct Answer Incorrect Answer

    Solution

    Speed of the train = 600 / 24 = 25 m/s
    New speed = 0.8 × 25 = 20 m/s
    Required time = (600 + 900) ÷ 20 = 1500 ÷ 20 = 75 seconds

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