outdoor world

full qs:
A track star, aiming for a world outdoor record, runs four laps of a circular track
that has a radius of 15.9 m in 47.8 s. What is the runner’s average speed for this
motion?

I have the answer for it and know the formula but I’m doing it wrong. I don’t know how to solve this.

Written by admin on December 21st, 2011 with 1 comment.
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