zad.1
4a=36cm
a=9cm
H=9cm
d=9cm
d=2r
2r=9cm
r=4.5cm
V=H*Pp
Pp=\pi r^2
Pp=\pi*(4.5cm)^2
Pp=20.25\pi cm^2
V=9cm * 20.25\pi cm^2
V=182.25\pi cm^3
Pc=Pp+Pb
Pb=2\pi r * H
Pb=2\pi*4.5cm*9cm
Pb=9\pi cm*9cm
Pb=81\pi cm^2
Pc=20.25\pi cm^2 + 81\pi cm^2 = 101.25\pi cm^2
zad.2
4a=24cm
a=6cm
H=6cm
d=6cm
d=2r
2r=6cm
r=3cm
V=H*Pp
Pp=\pi r^2
Pp=\pi * (3cm)^2
Pp=9\pi cm^2
V=6cm*9\pi cm^2
V=54cm^3
Pc=Pp+Pb
Pb=2\pi r*H
Pb=2\pi * 3cm * 6cm
Pb=6\pi cm * 6cm
Pb=36\pi cm^2
Pc=9\pi cm^2 + 36\pi cm^2 = 45\pi cm^2