The amount of cubic units of the volume of a sphere is double the amount of whole surface area of the same in square unit. Find the radius of the sphere.

The surface area of a sphere is 616cm^2 .Find its radius.

The ratio of the volumes of two sphere is 27: 8 . What is the ratio of their surface areas?

If the radius of one sphere is double the radius of another sphere,then find the ratio of the volumes of the spheres.

What is the volume of a solid sphere of radius 2R?

If the surface area of a sphere is 5544cm^2 .Find its diameter.

Choose the correct-one. If the surface area of a sphere is 144pi cm^2 then its radius is

The height of a cylinder is two-thirds of its diameter and the volume of the cylinder is equal to the volume of a sphere of radius 4 cm.Find the base radius of the cylinder.

(a) Find the moment of inertia of a sphere about a tangent to the sphere, given the moment of inertia of the sphere about any of its diameters to be 2MR^2IS, where M is the mass of the sphere and R is the radius of the sphere(b) Given the moment of inertia of a disc of mass M and radius R about any of its diameters to be MR2I4, find its moment of inertia about an axis normal to the' disc and passing through a point on its edge.

A hollow spherical conductor has charge 10^-7 coulomb of electric charge. Find the potential at the surface of the sphere. The radius of the sphere is 10 cm.

At a certain instant the volume of a sphere increses at the rate of 36 cm^3//sec and its surface area increases at the rate of 12 cm^2//sec . find the rate of change of its radius at that instant.