+895 The radius of a car wheel is 15 inches. How many revolutions per minute is the wheel making when the car is traveling at 60 mph?
+37146 60 m/hr x 5280 feet/m x 12 in/ft x 1 hr/60min = 63360 in/min
Circumference = pi x 2r = pi x 30 = 94.2477 inches/circumf
63360 in /min x 1 circumf/94.2477 inches = 672.27 circumf/min = rpm
+37146 60 m/hr x 5280 feet/m x 12 in/ft x 1 hr/60min = 63360 in/min
Circumference = pi x 2r = pi x 30 = 94.2477 inches/circumf
63360 in /min x 1 circumf/94.2477 inches = 672.27 circumf/min = rpm
+37146 Great! If we BOTH got the same answer, it is likely I got the right answer too! Thanx !
