If I have 24 inch Diameter tires that rotated 101 times in 15 seconds, how do I find out how fast they were going?
1 rotation is 24pi
so the speed would be
101*24pi/15 inches/sec
= 507.68137 inches/sec
=42.306781 ft/sec .... I divided by 12
= 2538.4069 ft/min ... I multiplied by 60
= ...
= ...
Can you see what I am doing to change my units?
You probably want mi/hour. Tell me what you get.