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  1. A and B walk around a circular track. They start at 8 a.m. from the same point in the opposite directions. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. How many times shall they cross each other before 9.30 a.m. ?
    2. A.
    5
    B.
    6
    C.
    7
    D.
    8

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    Answer : Option C

    Explanation :

    Relative speed = 2 + 3 = 5 rounds per hour.

    So, they cross each other 5 times in an hour and 2 times in half an hour.

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