Math Help - Help with Circles and Revolutions

1. 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.

2. 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?

3. Re: Help with Circles and Revolutions

Oh, thank you so much!

4. Re: Help with Circles and Revolutions

So you got the radius from that?

5. Re: Help with Circles and Revolutions

Well if the circumference is 4 yards, then you can divide it by 2 to get the radius.

6. Re: Help with Circles and Revolutions

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