Two athletes start together from the same point of a circular track 400 m round and run in opposite directions at 3 m/s and 5 m/s. How many times do they meet in 10 minutes?

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Accepted Answer

12. In opposite directions they close 3 + 5 = 8 m every second, and a meeting happens each time they jointly cover one lap of 400 m — that is every 400/8 = 50 seconds. In 10 minutes = 600 seconds they meet 600/50 = 12 times.

Two athletes start together from the same point of a circular track 400 m round and run in opposite directions at 3 m/s and 5 m/s. How many times do they meet in 10 minutes?

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