Circulating Tracks: Problem 3

Problem: On a 400-meter-long circular track, X and Y start at two points A and B going in the same direction, at the same time. 4 minutes later, X catches up to Y for the first time. 10 minutes later, X catches up to Y for the second time. If X's speed is 180 meters/minute, then what is Y's speed? What is the distance between A and B?

Catch-up Problems:

Key: Draw a sketch, use formulas from catch-up problems

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