DSSSB · Mathematics

A, B, and C run around a circular track of 420 m. Their speeds are 2 m/s, 3 m/s, and 5 m/s, respectively. B and C run in the same direction, while A runs in the opposite direction. If they all start together from the same point, after how many minutes will they meet for the first time on the track?

  1. 7
  2. 17
  3. 12
  4. 14
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