Question 4591
c=2*pi*r=72"
r=72/2*pi
R=r+6=(72/2*pi)+6
C=2*pi*R
=2*pi*[(72/2*pi)+6]
=2*pi*[(72+6*2*pi)/2*pi]
=72+12*pi
=72+(12*22/7)
=72+(264/7)
=(504+264)/7
=768/7
=109.714"