tolong dong caranya aku ga paham nih ???

diameter bola = rusuk kubus = 24 cm
jari² = 12 cm
vol bola = 4/3 ×phi × jari-jari³
= 4/3 × phi × 12³
= 4/3 × phi × 1728 ........ 1728÷4=576
= 4 × phi × 576
= 2304 phi
jawabannya B