Hitunglah jari jari bola dgn luas bola 5.544 cm (persegi)

Jari jari = 21
Volume = 1848

Luas permukaan = 4 x 22/7 x r x r
5544 = 4 x 22/7 x r x r
5544/4 =22/7 x r xr
1386 = 22/7 x r x  r
1386/22/7 = r x r
1386 /1 x 7 /22 = r x r
441 = r x r
akar 441 = 21, jadi jari jari 21

volume = 4/3 x 22/7 x r xr
volume = 4/3 x 22/7 x21 x 21
volume= 4/3 x 1386
volume = 5544/3
volume = 1848