SOLUTION: A car with wheels of radius 14 in. is driven at 35 mi/h, the wheels turn at an approximate rate of 420 rpm. Show how to obtain this rate of turn.

Question 884781: A car with wheels of radius 14 in. is driven at 35 mi/h, the wheels turn at an approximate rate of 420 rpm. Show how to obtain this rate of turn.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A car with wheels of radius 14 in. is driven at 35 mi/h, the wheels turn at an approximate rate of 420 rpm. Show how to obtain this rate of turn.
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420 rpm = 420*60 = 25200 rev/hour
Circumference = 2*pi*14 inches = 28pi inches
25200*28pi/(12*5280) = mi/hr
= 34.98 mi/hr
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