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    Question

    Train crosses a bridge which is 250 m long in 25 sec.

    Find the time taken by train to cross a man running in opposite direction at speed of 15m/sec. Find the speed of train.
    A Can’t be determined Correct Answer Incorrect Answer
    B 14 m/sec Correct Answer Incorrect Answer
    C 24 m/sec Correct Answer Incorrect Answer
    D 18 m/sec Correct Answer Incorrect Answer
    E 20 m/sec Correct Answer Incorrect Answer

    Solution

    Let the length of the train be ‘l’ meter, speed of train be ‘s’ m/sec and speed of man be ‘m’ m/sec. According to question, => (l + 250)/s = 25 A man running in opposite direction at speed of 15m/sec, => l/(m + s) = 15 The speed of train cannot be determined.

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