From the starting point of a 1.2 km track, two runners go opposite ways at 6 km/h and 9 km/h. After how many minutes do they first meet at the starting point?

Question

Accepted Answer

24 min. Lap times: 1.2/6 h = 12 min and 1.2/9 h = 8 min. Both at the start together after LCM(12, 8) = 24 min. (4.8 min is the first meeting anywhere.)

From the starting point of a 1.2 km track, two runners go opposite ways at 6 km/h and 9 km/h. After how many minutes do they first meet at the starting point?

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