A bicycle tire rim has a diameter of 24.5 inches, and the tire is 2.25 inches thick. Find the circumference of the outside of the tire.

Answer 1

well, the diameter of the outside is d = 24.5 + 2*2.25
since there is tire all the way around.
Now you can get the circumference: pi * d

Answer 2

D = 29
C = pi * 29
C = 91.06 inches