Question

The total surface area of a sphere is 8p square unit. The volume of the sphere is

Answer 1

[tex]S = 4 \pi r^2 \\ V = \frac{4}{3} \pi r^3[/tex].
Using these, you'll get $r = \sqrt{2}$.
 Then $V = \frac{4}{3} \pi (\sqrt{2})^3 = \frac{8\sqrt{2}}{3}\pi$