Question 192068
Circumference(C) equals Pi*Diameter(D) or C=Pi*D

If we increase the diameter by 5*2=10 feet, then we increase the circumference by pi*10 feet or approximately 31.4ft

C1=Pi*D1-------feet travel----------eq1
C2=Pi(D1+10)---head travel---------eq2


subtract eq1 from eq2
C2-C1=Pi*10

Hope this helps----ptaylor