Jari jari (r) = 20 : 2 = 10
Volume :
= 4 x x r x r
= 4 x 3,14 x 10 x 10
= 4 x 31,4 x 10
= 4 x 314
= 1.256
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Luas permukaan bola
= 4 × n × r²
= 4 × 3,14 × 10²
= 4 × 3,14 × 100
= 4 × 314
= 1.256
Jadi, luas permukaan bola tersebut adalah 1.256 cm².
Jari jari (r) = 20 : 2 = 10
Volume :
= 4 x x r x r
= 4 x 3,14 x 10 x 10
= 4 x 31,4 x 10
= 4 x 314
= 1.256
#DL
Semoga membantu :v