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Re: This Week's Finds in Mathematical Physics (Week 140)
Posted:
Oct 25, 1999 11:13 AM


In article <7updac$d0r$1@info.service.rug.nl>, p.helbig@jb.man.ac.uk wrote:
> The problem being: Two trains are 60 miles apart and approaching each > other at 30 miles per hour. There is a fly flying between the > cowcatchers of each train, at 60 miles per hour, back and forth, turning > around immediately. What is the total distance covered by the fly > (relative to the ground, NOT taking the motion in opposite directions to > cancel) until the trains hit?
60 miles?
Barnaby
[Moderator's note: Further discussion of this puzzle doesn't belong on sci.physics.research, unless some additional physics content can be injected. I would suggest that the thread be redirected to rec.puzzles, but I think that bringing up an old chestnut like this there would elicit some flames. TB]



