SOLUTION: A cyclist completed 5 laps of a circular track in one hour. If his average speed was 20 miles per hour, what is the diameter of the track

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Question 414591: A cyclist completed 5 laps of a circular track in one hour. If his average speed was 20 miles per hour, what is the diameter of
the track
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

A cyclist completed 5 laps of a circular track in one hour OR 1 lap in 1/5hr

 Distance = r*t = 20mph*1/5hr = 4mi around the track



Circumference = pi*d

   4mi = pi*d

  4mi/3.14 = diameter of the track.