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HallsofIvy

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If that's not sufficient, suppose you are traveling at 100 meters per minute, the other car is moving toward you at 100 meters per minute, and there is a point exactly halfway between you and the other car, 100 m from each car. How long will it take you to reach that point? How long will it take the other car to reach that point? So the distance between you has gone from 200 meters to 0 in that time. How fast were you moving toward each other?

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