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Pp= πr²
Pp=π(3cm)²
Pp=9cm²π
Pp=28,26cm²
V=28,26cm²*12cm
V=339,12cm³
Pc=2*πr²+2πrH
Pc=2*π(3cm)²+2π3cm*12cm
Pc=56,52cm²+226,08cm²
Pc=282,6cm²