tolong di jawab ya(:

luas bola = 4.phi.r^2
luas setengah bola = 2.phi.r^2
2.phi.r^2 = 308 cm^2
phi.r^2 = 154 cm^2
22/7.r^2 = 154 cm^2
r^2 = 49
r^2 = 7^2
r = 7 cm
Volume bola = 4/3.phi.r^3
volume 1/2 bola = 2/3.phi.r^3
= 2/3.22/7.(7)^3
= 718 2/3 cm^3