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    Question

    Two trains A and B, were proceeding in the same

    direction on parallel tracks at 98 km/hr and 170 km/hr respectively. A man noticed that it took exactly 15 seconds for the faster train to pass by him. What is the length of the faster train?
    A 210 m Correct Answer Incorrect Answer
    B 225 m Correct Answer Incorrect Answer
    C 300 m Correct Answer Incorrect Answer
    D 280 m Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Relative speed = (170 – 98) km/hr = 72 km/hr => 72 × (5/18) = 20 m/sec Length of the faster train = 20 × 15 = 300 m

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