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jari jari₁ = 2 x jari jari₂
jari jari₁ = 2 [] jari jari₂ = 1
luas permukaan bola₁ : luas permukaan bola₂
4 πr₁² : 4 πr₂²
r₁² : r₂²
2² : 1²
4 : 1
volume bola₁ : volume bola₂
4/3 x πr₁³ : 4/3 x πr₂³
r₁³ : r₂³
2³ : 1³
8 : 1