Odpowiedzi

2010-03-31T17:34:47+02:00
D₁ = 12 cm
d₂ = 20 cm
r₁ = 12/2 = 6cm
r₂ = 20/2 = 10 cm
H₁ = 10 cm
H₂ = 20 cm
V1 = πr²H
V1 = π*6²*10
V1 = 360π cm³
V2 = π*10²*20
V2 = 2000π cm³
V1+V2 = 360π+2000π = 2360π cm³
Vk = 4/3πr³
4/3πr³ = 2360π |:(4/3π)
r³ = 1770
r = ∛1770 cm