Question

Luas permukaan bola=616 cm volume bola adalah..

Answer 1

Lp.bola = 4 . phi . r²
616 = 4.22/7 . r²
4.22.r² = 616.7
r² = 616.7 / 4.22
r²= 4312/88
r²=49
r=√49 =7

V=4/3. phi. r³
V= 4/3.22/7.7.7.7
V=4/3.22/7.343
V=1437.333