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January 31, 2015

January 31, 2015

Posted by **Akshat121** on Wednesday, September 25, 2013 at 2:50am.

If the path of the runner running at a greatest radius of 20 m is 100 m long, how far behind in m should the runner at the smallest radius start? The smallest radius is 15 m.

- Physics -
**bobpursley**, Wednesday, September 25, 2013 at 10:11amdistance will be proportional to radius.

(perimeterofCircle=PI*2*radius)

difference in perimeters=2PI*(20-15)

so that distance is the how far behind should the inner radius be.

- Physics -
**Anonymous**, Friday, September 27, 2013 at 3:04pmSo, what is the answer?

- Physics -
**John**, Sunday, September 29, 2013 at 4:57pmI am not sure how you are calculating this problem since you wrote it in abbreviations so could you please explain again?

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