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    Question

    A train of length 180 m crosses another train of length

    120 m coming from the opposite direction. If the speeds of the two trains are 6 m/sec and 9 m/sec respectively, what time will they take to completely pass each other?
    A 20 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 12 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Relative speed = 6 + 9 = 15 m/sec

    Combined length = 180 + 120 = 300 m

    Time taken = 300 / 15 = 20 seconds

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