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Verified answer
Luas permukaan= 4×π×r²314= 4×3,14×r²
314= 12,57×r²
r²= 314÷12,56
r²= 25
r= √25
r= 5 cm
volume bola= 4/3×π×r³
= 4/3×3,14×5³
= 523,33 cm³