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Jack takes 20 minutes to jog around the race course one time, and 25 minutes to jog around a second time. What is his average speed in miles per hour for the whole jog if the course is 3 miles long?

Correct Answer: 8

Explanation:

Average speed = total distance / total time


Total distance covered = 6 miles; total time = 45 minutes = 0.75 hours


Average speed = 6/ 0.75 = 8 miles/hour


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