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V=π8²×12=12×64π=768π(cm³)
Pc=2π8²+2π8×12=108π+ 192π=300π(cm²)
Jeżeli promień 12cm
V=π12²×8=1152π(cm³)
Pc=2π12²+2π12×8=288π+192π=480π(cm²)