Question

A car is traveling at 46 mph. it its tires have a diameter of 26 inches, how fast are the car's tires turning? express the answer in revolutions per minute rounded to the nearest .01

Answer 1

Circumference of the tire:

PI x diameter = 3.14 x 26 = 81.6814 Round to 81.68

Speed of the car in inches per minute:

46*5280*12/60 = 48576 inches per minute

48576/81.68 = 594.711

Round to 594.71 revolutions per minute