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2pi*r= 9pi
r= 3,5
Pp= pi*r^2= 12,25
V= 1/3*12,25*27= 110,25cm3
Ob = 2πr
9π = 2πr
2πr = 9π
r = 3,5cm
H = 27cm
V = ⅓ πr²H
V = ⅓ 3,14 * 3,5² * 27
V = ⅓ * 1038,555
V = 346,185 cm³
V ≈ 346,2 cm³
Odp: Objętość stożka wynosi 346,2 cm³.
Liczę na naj :)