A truck driver took 7 hours and 45 minutes to travel 426.25 miles. What was the average speed of the

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A truck driver took 7 hours and 45 minutes to travel 426.25 miles. What was the average speed of the truck driver?

45/60 = 0.75 of an hour
7 hours and 45 minutes = 7.75 hours

426.25 miles / 7.75 hours miles = 55 miles per hour