Circular track

The circular running track has a radius of 50 m. How many laps does a runner have to make to run 5 km?

Correct answer:

n =  16

Step-by-step explanation:

r=50 m o=2π r=2 3.1416 50314.1593 m  s=5 km m=5 1000  m=5000 m  n1=s/o=5000/314.159315.9155  n=n1=15.9155=16

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