Meet-Up Problems: Problem 4

Problem: Points A, B are two points. Person 1 is at A, and Person 2 is at B. The two start walking towards each other's starting points. They meet first at point C, which is 100 meters from point A. After Person 1 has reached point B, he turns around to start towards A, while after Person 2 has reached point A she turns around to start towards B. The two meet again at point D, 80 meters from point B. The speeds of both people stay constant. Find the distance from A to B.

Key: Listing out information and then using ratios

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