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Posted by **mathfailure** on Tuesday, November 20, 2012 at 11:39am.

- geometry -
**Damon**, Tuesday, November 20, 2012 at 12:00pminside wheel at radius r

outside wheel at radius 2 r because circumference is twice

so r = 6

so

2 pi r = 12 r

- geometry -
**Steve**, Tuesday, November 20, 2012 at 12:02pm2(2pi r) = 2pi (r+6)

2pi r = pi r + 6pi

pi r = 6pi

r = 6

so, the distance is 2pi * 6 = 12 pi

- geometry -
**mathfailure**, Tuesday, November 20, 2012 at 12:02pmthanks alot man!

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