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Pb = πrl
72πcm² = π×½l×l /:π
72 = ½l²
l² = 144
l=12cm
r = 6cm
wtedy r² + H² = l²
6² + H² = 12²
H² = 144 - 36
H² = 108
H =√108
H = 6√3 cm
V = ¹/₃ πr²×H
V = ¹/₃ π 6² × 6√3
V = 72√3π cm³
odp. objętosć wynosi 72√3π cm³
Pp=pi *12 do 2
Pp=144picm2
v=1/3PpH
v=1/3 12pierwiastków z 3*Pp
v= 1/3 *144cm2 *12 pierwiastków z 3= 576 cm3