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The wheels of a car have radius 10 in. and are rotating at 800 rpm. Find the speed of the car in mi/h.

 Oct 28, 2020
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Circumference of wheel/tire in FEET =   2 * r * pi  / 12

 

now the tire travels 800 of these distances PER MINUTE

   800   *   2  * r*pi  / 12          multiply this by 60 minutes in an hour to get feet per hour

60 * 800* 2*r*pi / 12               divide this number by 5280 feet in a mile to get miles per hour

 Oct 28, 2020

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