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Bangun Ruang Sisi Lengkung.V bola / V tabung = (1/6 πd³) / (1/4 πd²t)
V bola / V tabung = (2d) / (3t)
V bola / V tabung = 2(7 cm) / [3(7 cm)]
V bola : V tabung = 2 : 3