Question

    If a train takes 30 seconds to pass a tree and 40 seconds

    to pass a bridge that is 250 meters long, what is the speed of the train?
    A 6 Correct Answer Incorrect Answer
    B 11 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 25 Correct Answer Incorrect Answer

    Solution

    ATQ;
    Let length of the train be ‘L’ metres
    ATQ,
    (L/30) = {(L + 250)/40}
    Or, 40L = 30L + 7500
    Or, 10L = 7500
    Or, L = 750
    So, length of the train = 750 metres
    Therefore, speed of the train = (750/30) = 25 m/s

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