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  1. A and B go around a circular track of length 600 m on a cycle at speeds of 36 kmph and 54 kmph. After how much time will they meet for the first time at the starting point?
    2. A.
    120 sec
    B.
    150 sec
    C.
    140 sec
    D.
    130 sec
    E.
    None of these

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    Answer : Option A

    Explanation :

    Time taken to meet for the first time at the starting point

    = LCM { length of the track / speed of A , length of the track / speed of B}

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