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r=6√3
h=6
V=1/3×π×(6√3)²×6
V=1/3×108×6
V=108×2
V=216cm³
Pc=π(6√3)²+π×6√3×12
Pc=108π+72√3π
Pc=180√3πcm²
a=H=6
a√3=r=6√3
V=⅓ πr² × H
V=⅓ π × (6√3)² × 6 = ⅓ * π * 108 * 6 = 648π/3 = 216π
P=πr² + πrl
P= π * (6√3)² + π * 6√3 * 12 =108π + 72√3π = 180√3π