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I can't help it:
"If a bot-car is headed north on I-75 at 73 miles per hour for 3 hours
and a bot-truck is headed west on I-90 at 67 miles per hour, how long
until they are 129 miles apart?"
Hmm -- I was going to say 127.1 miles apart, but that's not a v6
address... 1918 miles apart?
--Steve Bellovin, http://www.cs.columbia.edu/~smb