Question

The volume of a sphere is 1200ft³, what is the radius? what is the surface area?

Answer 1

Since V = (4/3) pi*r^3, r^3 = V / [(4/3)*pi ].

                    1200 ft^3
Here, r^3 = ---------------
                    [(4/3)*pi ]

Evaluate this, and then take the cube root of your result, and then you'll have the radius.

Once you have this radius, the surface area will be A = 4*pi*r^2.