+293 The wheels of a car have radius 10 in. and are rotating at 800 rpm. Find the speed of the car in mi/h.
+37146 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
