SOLUTION: A tire for a car is 28 inches in diameter. If the car is traveling at a speed of 90 mi/hr, find the number of revolutions the tire makes per minute. (Round your answer to the neare

Question 707894: A tire for a car is 28 inches in diameter. If the car is traveling at a speed of 90 mi/hr, find the number of revolutions the tire makes per minute. (Round your answer to the nearest hundredth.)
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
A tire for a car is 28 inches in diameter. If the car is traveling at a speed of 90 mi/hr, find the number of revolutions the tire makes per minute. (Round your answer to the nearest hundredth.)
**
90 mi/hr*5280 ft/mi*12 inches/ft*60 min/hr
mi,hr,ft, cancel out
90*5280/12*60=600 in/min
circumference of wheel=π*diameter=π*28=87.965 inches
(600in/min)/(87.965 in/rev)
600/87.965≈6.821 rev/min
number of revolutions the tire makes per minute=6.821
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