A truck driver traveled at an average speed of 55 miles per hour on a 200-mile trip to
Chapter 2, Problem 57(choose chapter or problem)
A truck driver traveled at an average speed of 55 miles per hour on a 200-mile trip to pick up a load of freight. On the return trip (with the truck fully loaded), the average speed was 40 miles per hour. Find the average speed for the round trip.
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