V = pi * r^2 * h
V = 470.48
h = 6.5
(pi) = 3.14
now sub
470.48 = 3.14 * r^2 * 6.5....now divide both sides by 6.5(pi)
470.48 / 6.5(3.14) = r^2
470.48 / 20.41 = r^2
23.05 = r^2.....take sqrt of both sides, eliminating ^2
sqrt 23.05 = r
4.8 = r <==== ur radius is 4.8 ft