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How many revolutions will a car wheel of diameter 18 in. make as the car travels a distance of one mile? (Round your answer to the nearest whole number.)

Guest Apr 19, 2018
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The radius  is 9in  =  3/4 ft 

The distance that the whell travels in one revolution  is    2pi * (3/4) ft  = (3/2)pi ft = (1.5pi ) ft

The number of feet in a mile  = 5280

 

So....the number of revolutions it makes is

 

5280 /[ 1.5pi ]  ≈     1120 revolutions

 

 

cool cool cool

CPhill  Apr 19, 2018

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