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The tires on your bicycle have a diameter of 9 inches. How many rotations does each tire make when you travel 300 feet? Round your answer to the nearest whole number.

Guest Feb 15, 2017
edited by Guest  Feb 15, 2017
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 #1
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300/(9/12 x pi) = 127 rotations

ElectricPavlov  Feb 15, 2017
 #2
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Diameter = 9in  = 3/4 ft    so.......the radius  = 3/8 ft

 

One rotation  = [ 2pi* r]  ft   =  2pi * (3/8) ft  =  3pi/4 ft

 

300 /   (3pi/4)  =    (4/3) * 300 /  pi  =   400 / pi   ≈ 127.32  = 127 rotations

 

 

 

cool cool cool

CPhill  Feb 15, 2017

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