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Math Help - Finding the revolution of this problem

  1. #1
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    Finding the revolution of this problem

    How many revolutions will a car wheel of diameter 26 inches make as the car travels a distance of seven miles?

    sadly i can't solve it
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  2. #2
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    Quote Originally Posted by lildeathboy View Post
    How many revolutions will a car wheel of diameter 26 inches make as the car travels a distance of seven miles?

    sadly i can't solve it
    1. The circumference of the wheel is

    c = \pi \cdot d~\implies~c=26\pi\ ''

    2. Convert the 7 miles into inches. (I'm not used to inches, miles, etc. so I used a calculator. But better check this value!)

    7\ mi = 443520\ ''

    3. To determine how often 7 miles contain the circumference of the wheel you have to divide:

    r = \dfrac{443520\ ''}{26\pi\ ''} \approx 5429.9\ revolutions
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  3. #3
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    thank you

    i really appreciate it
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