Finding rate in math....
Rate=distance/time
So if the distance is a circumference which in this case is 10 pie, and the time is 10 seconds. You multiply 10 and the circumference but is the 10 seconds TEN or 1/6
rate is in units of distance/time, as in ft/sec or mi/hr.
you haven't stated what units the circumference is in. feet, km, miles, angstroms, what?
Assume ft.
rate = 10pi ft/10sec = pi ft/sec
the last part of the question makes no sense to me...