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d bola = d tabung = t tabung
B : T = (4/3)π(d/2)³ : π(d/2)²(d)
(1/6)πd³ : (1/4)πd³
(1/6) : (1/4)
3 : 2 ← perbandingan
Bila v tabung: v bola maka 2:3
Luas
4π(d/2)² : (2π(d/2)d + 2π(d/2)²)
πd² : (πd²+(πd²/2))
πd² : πd²(3/2)
1 : (3/2)
2 : 3