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    Question

    Two trains of lengths 90 m and 70 m are moving towards each

    other at speeds of 4 m/sec and 6 m/sec. How many seconds will they take to cross each other?
    A 16 secs Correct Answer Incorrect Answer
    B 18 secs Correct Answer Incorrect Answer
    C 22 secs Correct Answer Incorrect Answer
    D 10 secs Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Relative speed = 4 + 6 = 10 m/sec

    Time taken by the 2 trains to cross each other = (90 + 70) / 10 = 160 / 10 = 16 seconds

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