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14.130=4/3×3,14×r³
14.130×3=4×3,14×r³
42390=12,56 r³
r³=42390:12,56
r³=3375
r=∛3375
r=15 cm
Lp bola=4πr²
=4×3,14×15²
=2826cm² (C)