Answer
V=72$\pi$$\sqrt 3$$\approx$391.8 cm$^3$
Work Step by Step
r=.5l
r=6
h=r$\sqrt 3$
h=6$\sqrt 3$
V=$\frac{1}{3}$Bh
V=$\frac{1}{3}$($\pi$6$^2$)(6$\sqrt 3$)
V=72$\pi$$\sqrt 3$$\approx$391.8 cm$^3$
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