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Dik. Volume bola = 57.876,48 cm^3Dit. Luas permukaan bola (Lpb) ?
Jawab...
Volume bola = 4/3 × phi × r^3
57.876,48 = 4/3 × 3,14 × r^3
57.876,48 × 3/4 = 3,14 × r^3
43.407,36 = 3,14 × r^3
@ r^3 = 43.407,36/3,14
@ r^3 = 13.824
@ r = 24cm
Luas permukaan bola : 4 × phi × r^2
@ 4 × 3,14 × (24)^2
@ 4 × 3,14 × 576
@ 7.234,56 cm^3
Note : tanda ^ itu pangkat ya...
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