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Two runners leave the same point of a 400 m track in opposite directions at 6 m/s and 4 m/s. How many times do they meet before the faster one completes 5 laps?

Competition practiceRaces & Circular Tracks
  • A8
  • B9
  • C5
  • D12

Step-by-Step Solution

Five laps take the faster runner s. They meet every s, so 8 meetings (the 9th would be at 360 s).
Answer: A) 8

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