Posted by **Pamela** on Wednesday, August 17, 2011 at 2:27pm.

A runner runs around a circular track with a radius of 50m.if he runs half way round the track from a to b.am i correct if i say his distance is 100m?

- Physics -
**bobpursley**, Wednesday, August 17, 2011 at 4:43pm
No, not if he ran around the track half way.

half way around a circle is radius*PI

- Physics -
**Henry**, Wednesday, August 17, 2011 at 6:44pm
C = 2pi*r = 6.28 * 50 = 314m/rev = The

Crcumference = The distance around the track.

d = 1/2 * 314m = 157m.

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