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V=Pp*H
V=108π cm3
H=12 cm
Pp=V/H
Pp=108π/12
Pp=9π
Pp=πr²
πr²=9π
r²=9
r=3
Pc=2Pp+Pb
Pc=2*9π +2πrH
Pc=18π +2π*3*12
Pc=18π +72π
Pc=90π cm²
h= 12 cm.
OBL Pc
V=Pp*h=πr²h
πr²*12=108π
r²=108/12=9
r=3
Pc=2Pp+2πrh=2πr²+2πrh=2πr(r+h)
Pc=2π*3*(3+12)=90πcm²≈282,6cm²
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