Velocity = Radius x RPM
For example if a body of 32 Inches in diameter rotating at 3600 rpm, the velocity is calculated by
Velocity = 32/2 * 3600
Velocity = 57,200 inches per minute
Velocity = 57,200 Inches/min * 60 Min/Hr * 1ft/12in * 1 mi/5280 ft
Velocity = 54.5 miles per hr
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The formula for velocity is (v = d/t) or (velocity = distance/time).
Velocity is distance / time
The distance formula using Pythagorean theorem: trig values trig formulas triangle abc trigonometric concepts trigonometric formulas.
Euler published the formula, which relates complex exponentials to trigonometric functions in 1748. See related link.
velocity = frequency / wavelength, I believe.