A car is traveling along Route 66 at a rate of 55 miles per

A car is traveling along Route 66 at a rate of 55 miles per hour, and the diameter of its wheels are 2.7 feet. Find the number of revolutions per minute the wheels are turning. Round answer to one decimal place. a. 285.3 rpm b. 845.3 rpm c. 570.6 rpm d. 108.1 rpm e. 190.2 rpm

Solution

wheel circumference = 2.7*pi = 8.48 ft

speed = 55 mph = 290400 ft/h

No. of revolutions = 290400/8.48 = 34245.28 rot/h = 570.75 rot/min