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V= vk+¹/₂vb
Vk= ¹/₃π.r².t
Vb= ¹/₂.⁴/₃ π r³
= ²/₃ π r³
hasil tadi dikalikan dengan 10 gram
Vk= ¹/₃ 3,14x2x2x14
Vb= ¹/₂.⁴/₃ π r³
= ²/₃ 3,14x2x2x2