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Pc=4πr²
V=4/3π27
V=36π[cm³]
Pc=4π9
Pc=36π[cm²]
r=3cm
p=?
v=?
p=4(pi)r2
v=4/3(pi)r3
p=4(pi)*3(2)
p=36(pi)cm2
v=4/3(pi)3(3)
v=36cm3