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V=490picm3
pi *r^2 *h=490pi
h=10cm
pi*r^2*10=490pi/:pi
r^2*10=490/:10
r^2=49/wyłączyć pierwiastek
r=7-promien
d-średnica
d=2r
d=2*7
d=14cm
Pb=2*pi*r*h
Pb=2*pi*7*10
Pb=140picm2