From: utzoo!decvax!harpo!seismo!rocheste!gary
Newsgroups: net.jokes
Title: Re: Mathematician Joke: Another Version
Article-I.D.: rocheste.410
Posted: Thu Jan 13 12:33:20 1983
Received: Sat Jan 15 04:57:52 1983
References: ihlpb.218

I heard the end as,

        One guy says "oh, I see how you did it, just multiply 20 mph
times the time it takes for them to hit", to which Von replies, "Well, I
just summed the infinite series."

        I think this is a better way to tell it (no offense to original
joke poster).

                                gary cottrell (...!seismo!rochester!gary)