Math
posted by Devon .
A wheel with radius 2 cm is being pushed up a ramp at a rate of 6 cm per second. The ramp is 520 cm long, and 260 cm tall at the end. A point P is marked on the circle. How far does the wheel travel in one rotation?

Math 
Steve
Discard the noise  all we care about is the circumference of the wheel.
C = 2pi r = 4pi cm
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