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Pp=3V/H
Pp=3*50π=6 =50π/2=25π cm²
Pp=πr²
r²=Pp/π
r²=25π/π
r=√25
r=5 cm promień podstawy
v=1/3 πr²h
50π=1/3π r²*6 /;π
50=2r² /;2
r²=25
r=√25
r=5cm= promień