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jika bola mempunya Diameter = panjang rusuk kubus
r bola = 1/2x 29 = 14,5cm
Vol bola terbesar = 4/3 x π x r³
= 4/3 x 3,14 x 14,5³
= 12,56/3 x 3.049
= 12.763,57 cm³
= 4/3 x phi x r^3
= 4/3 x phi x 14,5 x 14,5 x 14,5
= 12194.5 x phi / 3
= 4064.83 phi cm^2