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b. V 3 bola pejal = V tabung
4/3 π r³ = πr²t (coret π nya)
4/3 x 7/2 x 7/2 x 7/2 = 21/2 x 21/2 x t
t = 14/6
t = 2,3 cm
ketinggian setelah bola pejal dinmasukkan
= 12 + 2,3
= 14,3 cm
namun karena tinggi tabung hanya 14 cm, maka air dalam tabung akan tumpah