Circumference of a circle = 2 * pi * radius Use the equations above or any notes you want.​ Show your work​. ​Include units​. Please ask me if you have questions or get stuck. 1) The outside diameter of your teacher’s rear bicycle tire is 20 inches. How far will he travel if the rear wheel makes 900 revolutions on the road? How many revolutions will the front wheel make during that distance? The front tire is only 14 inches in diameter.