6th Grade Itinerary Problem Solution Review: Problem 2

Problem: Kangbin and Karen are walking from points A and B. They start from their points at the same time towards each other, and once they reach one point they turn around and continue walking. This goes on continuously between the two of them. Kangbin's speed is 15 kilometers per hour and Karen's speed is 25 kilometers per hour. The points in which the third time they meet and the fourth time they meet are 100 kilometers apart. What is the total distance between A and B?

Key: Find speed ratio and create the sketch accordingly.

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