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→ 4/3πr³ : 4/3πr³ (coret 4/3 dan π)
→ r³ : r³
→ 2³ : (5/2)³
→ 8 : 125/8
__________(x 8)
→ 64 : 125
Note
r1 = 1/2 x 4 cm → 2 cm
r2 = 1/2 x 5 cm → 5/2 atau 2,5