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a car races on a circular track of radius 400 m and the time to complete one lap is 40 s. What is the average
a car races on a circular track of radius 400 m and the time to complete one lap is 40 s. What is the average speed around the track?
A. 20 m/s
B. 63 m/s
C. 10 m/s
D. 4 m/s
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