A boy, a girl and a dog are standing together on a long, straight road. Simultaneously, they all start walking in the same direction: The boy at 4 mph, the girl at 3 mph, and the dog trots back and forth between them at 10 mph. Assume all reversals of direction instantaneous.

In one hour, where is the dog and in which direction is he facing?

http://rec-puzzles.org/new/sol.pl/analysis/boy.girl.dog

I would not have copied this one verbatim from the Internet. I would have changed the participants from "boy, girl, dog" to "hockey player, geisha girl and aardvark, moving at 8mph, 3 mph and 20mph"

:-)
Edited on January 24, 2004, 10:28 am

Posted by Penny on 2004-01-24 10:24:18