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V= 2 m³
a= 5 m
H=?
V= Pp*H
2 = 5²*H
2=25H
H=2 : 25
H=0,08 m
Zad 2
r=6 cm
H=6 cm
Pb=2πr*H
Pb=2π*6*6
Pb=72π cm²