SOLUTION: Your car travels at 75 mph on the interstate. You drive at this rate for 90 minutes. If your car tires have a diameter of 20 inches, how many times will each tire revolve while dri

Question 642385: Your car travels at 75 mph on the interstate. You drive at this rate for 90 minutes. If your car tires have a diameter of 20 inches, how many times will each tire revolve while driving those 90 minutes?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Your car travels at 75 mph on the interstate. You drive at this rate for 90 minutes. If your car tires have a diameter of 20 inches, how many times will each tire revolve while driving those 90 minutes?
**
Distance car traveled=speed*travel time=75 mi/hr*90 min=
75*1.5=112.5 mi*5280 ft/mi*12 in/ft=7.128*10^6 in
circumference of tire=π*diameter=π*20 in
Times will each tire revolve while driving those 90 minutes
=distance traveled/circumference of tire
=7.128*10^6/π*20=(3.564/π)*10^5
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