Question

    A, B, and C run around a Circular track starting from

    the same point simultaneously and in the same direction at 12 km/h, 24 km/h, and 36 km/h respectively. If the length of the track is 600 meters, when will A, B, and C meet at the starting point for the first time after they start the race?
    A 3min Correct Answer Incorrect Answer
    B 10min Correct Answer Incorrect Answer
    C 12min Correct Answer Incorrect Answer
    D 18min Correct Answer Incorrect Answer

    Solution

    ATQ,

    Length of track = 600m=0.6km. Speeds: A=12km/h, B=24km/h, C=36km/h. Times to complete one lap:

    Find LCM of 3, 1.5, and 1: Convert 1.5= 3/2 ​LCM of 3, 3/2, and 1 is 3minutes

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