# trigonometry

If a flywheel is 3 feet in diameter and if a belt over the wheel is traveling at the rate of 3000 feet per minute, find the number of revolutions of the wheel per minute.

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1. same kind of problem here
http://www.jiskha.com/display.cgi?id=1314932124
Just change the numbers

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2. actually a bit different, ....

one rotation covers 3π feet
number of rotations = 3000/(3π) = 1000/π or appr 318.3 times per minute

check:
318.3 rmp times 3π = 3000 feet

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