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The Average Traveler

There are two towns, conveniently called ``A'' and ``B'' joined by a road. A businesswoman must drive from A to B, conduct some business (what else?) and return to A. She wants her total round trip speed to average 60 miles per hour, but she encountered heavy traffic going to B and averaged only 30 miles per hour on the first half of the trip. What should her average speed be on the return trip to meet her goal?

Carl Lee
Wed Apr 21 08:26:07 EDT 1999