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V=4/3 π r³
4/3 π r³ = 36 π /:4/3π
r³=36*3/4=9*3=27
r=3 cm
P=4πr²
P=4*3²*π =4*9π
P=36π cm²
4.
V=πr² h
π*6² *h = 108π /:36π
h= 3 cm