Date: Tue, 14 May 1996 16:13:02

From: Ken Ross

It's a nice problem. I solved it using coordinate geometry. That approach has the benefit that one can construct the time of the meeting of persons 3 and 4 in terms of the meeting times of the other people. I also wanted to mention that the problem specification mentions that the speeds are all different, but the solution still works if several of them are walking at the same speed.

Ken Ross.