mike ran ten laps around his school's 1/4 mile track in 15 minutes. He finishes his run at the exact same point that he started. What was his average velocity in miles per hour?
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Answer: 10 miles per hour
Explanation: First, find the velocity in miles per hour. Since he ran 10 laps around a 1/4 mile track, that would mean he ran a total of 2.5 miles. To find velocity, divide distance by time. Since the answer needs to be in hours, convert 2.5 miles/ 15 minutes into mph using dimensional analysis.
2.5 miles. 60 minutes
----------- x. --------------- = 10 miles per hour.
15 minutes 1 hour
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