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Pp=πr²
Pp=π*2²
Pp=4πcm².
Pb=2πrh
Pb=2*π*2*8
Pb=32πcm²
Pc=2Pp + Pb
Pc=2 * 4πcm² + 32πcm²
Pc=40π cm²
V=πr²h
V=π*2²*8
V=32 cm³
To wszystko jeżeli musisz podstawiać pod π to sobie podstaw π w zaokrągleniu to 3,14.