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      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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