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Math Help - Help with Circles and Revolutions

  1. #1
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    Help with Circles and Revolutions

    There are 1760 yards in a mile. A certain wheel makes 17,600 revolutions in 40 miles. What is the number of yards in the radius of the wheel? Give your answer as a decimal to the nearest tenth of a mile.
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  2. #2
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    Re: Help with Circles and Revolutions

    the wheel travels a distance of \frac{40 \cdot 1760}{17600} = 4 \, yds in one revolution, so that would mean the wheel's circumference is 4 yds, correct?
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  3. #3
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    Re: Help with Circles and Revolutions

    Oh, thank you so much!
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  4. #4
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    Re: Help with Circles and Revolutions

    So you got the radius from that?
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    Re: Help with Circles and Revolutions

    Well if the circumference is 4 yards, then you can divide it by 2 to get the radius.
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  6. #6
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    Re: Help with Circles and Revolutions

    Quote Originally Posted by Espionage View Post
    Well if the circumference is 4 yards, then you can divide it by 2\color{red}\pi to get the radius.
    correction ...
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