Find the circumference.
Use 3.14 for n.
r = 6 ft
C = [?] ft
C=Td

In the circumference formula given d is the diameter which is 2 times r ( r is the radius)
R is given as 6 feet, diameter = 2 x 6 = 12 feet.
Circumference = 12 feet x 3.14 = 37.68 feet