Question 542741: Karen has to run five laps around a small track with a radius of 40 meters. How far must she run? Use 3.14 for pie. Answer by lmeeks54(111) (Show Source):
You can put this solution on YOUR website! You need the formula for the perimeter of a circle to solve this one.
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Let P = the perimeter of the circular track
Let r = the radius of the circle in meters
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Given:
pi = 3.14
r = 40m
P = 2pi * r
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First figure out the distance one lap takes...which is the perimeter of the circle (track):
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P = 2(3.14)(40)
P = 251.2 meters
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Then calculate for Karen running around the track 5 times:
her run = 5 * P
her run = 5 (251.2)
her run = 1,256 meters
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cheers,
Lee
