Asked by Maddie

A 3-foot diameter wheel travels at a rate of 45 feet per second. How many seconds does it take for the wheel to make 100 turns?

Answers

Answered by Steve
since the circumference is 3π feet, it makes 45/3π = 15/π turns per second.

That is π/15 seconds per turn. So, it takes 100π/15 = 20π/3 seconds to do the job.
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