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A truck driver travels at an average speed of 75 miles per hour on a 210-mile...

A truck driver travels at an average speed of 75 miles per hour on a 210-mile trip to pick up a load of freight. On the return trip (with the truck fully loaded), the average speed is 65 miles per hour. What is the average speed for the round trip? (Round your answer to one decimal place.)

answer: _________ mph

Math   Precalculus   
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