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h=wysokosc
h=2r
Pp=πr²
Pb=2πrh
2πrh=πr²+12π/:π
2rh=r²+12
2r×2r-r²=12
3r²=12
r²=12:3
r²=4
r=2cm
h=4cm
Pp=πr²=π×2²=4π
Pb=2π×2×4==16π
Pc=2×4π+16π=24πcm²
v=4π×4=16πcm³
Pp=πr²
Pb=2πrh
V=Pph
2πrh=πr²+12π
h=2r
2πr*2r=πr²+12π
4πr²=πr²+12π
4πr²-πr²=12π
3πr²=12π
r²=12π/3π
r²=4
r=2 cm
h=2*2
h=4 cm
Pc=2π*2²+2π*2*4
Pc=8π+16π
Pc=24π cm²
V=π*2²*4
V=16π cm³