please help on these questions

Answer:
6) 9216π
8) 24
Step-by-step explanation:
6)
V= 2/3πr³
r = 48/2 = 24
V = 2/3π24³
V = 9216π
8)
V = 4/3πr³
2304π = 4/3πr³
r³= (2304π)/4/3π
r³= 1728
[tex]\sqrt[3]{r^3} =\sqrt[3]{1728}[/tex]
r = 12
D = 2r
D = 2 x 12 = 24