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MathNet 2012 Question 32

Math Olympiad Vault · MathNet 2012

Question 32

Pedestrian, Cyclist and Motorcyclist start at 12.00 from town $A$ to town $B$ simultaneously. When each of them arrives at $B$ he whip rounds and moves to $A$, when he arrives at $A$ he again whip rounds and moves to $B$, and so on. After the start of the movement the first meeting is the meeting of Cyclist and Motorcyclist at some point $C$. By this time Pedestrian passes $1/6$ part of the distance between $A$ and $B$, and after 6 minute he meets Motorcyclist. The first meeting of Cyclist and Pedestrian is also held at $C$.
When do Pedestrian, Cyclist and Motorcyclist meet each other at the same point for the first time?