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Q.
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?
A.
6
B.
8
C.
9
D.
10
View Answer
Correct choice: B
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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