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Pw=πr²+2πr*H
Pw=π49+14π*20
Pw=49π+280π
Pw=329*3.14
Pw=1033.06
Po=π14²
Po=196π
Po=615.44
Po2=615.44-(49*3.14)
Po2=615.44-153.86
Po2=461.58
pole ciemne=1033.06+615.44+461.58=2110.08
Jasny materiał:
Pw=1033.06=jasne pole