Volume of a Cone = (1/3)(pi)(radius)(radius)(height)
we are given:
pi = 3.14
height = 6
Volume = 8(3.14)
plug in
8(3.14) = (1/3)(3.14)(radius)^2 (6)
8 = (1/3)(6)(radius)^2 [divided both sides by 3.14]
8 = (2)(radius)^2 [simplified (1/3)*(6)]
4 = (radius)^2 [divided 2 from both sides]
radius = 2 [square rooted both sides (sqrt(4))=2]
therefore the radius = 2 ft