If an object moves along a circular path of radiusrunits, then its linear velocity,v, is given by:

where represents the angular velocity in radians per unit of time.

480 revolutions = radians per minute or radians per minute.

Here it is in one fell swoop:

And here it is all broken out:

This translates to .

Find the circumference of the wheel

rev/min

The miles, inches, feet, and hours cancel leaving you with revolutions over minutes