A and B are running on a 400 meter circular track. If they start in the same direction, they meet every 3 minutes. If they start in the opposite direction, they meet every 40 seconds. What are their respective speeds? (a is faster than B)

A and B are running on a 400 meter circular track. If they start in the same direction, they meet every 3 minutes. If they start in the opposite direction, they meet every 40 seconds. What are their respective speeds? (a is faster than B)

Let a XM / min, B YM / min and x > y be obtained from the meaning of the title
When you go in the same direction, you have
(X-Y)*3=400
When we go in opposite directions, we have some problems
（X+Y）*（2/3）=400
The solution is x = 1100 / 3
Y=700/3
A: the speed of a is (1100 / 3) m / min, and that of B is (700 / 3) m / min
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