Answer
V$\approx$249.4 ft$^3$
Work Step by Step
B=.5aP
B=.5(3$\sqrt 3$)(36)
B=54$\sqrt 3$
V=$\frac{1}{3}$(54$\sqrt 3$)(8)
V=144$\sqrt 3$
V$\approx$249.4 ft$^3$
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