If the radius of a sphere is doubled, then what is the ratio of their surface area?

The surface area of a sphere of radius 14 cm is:

  A sphere has a surface area of 16π sq.cm. If the radius is doubled, then the surface area of the larger sphere is

Complete:

Sphere is obtained from the rotation of the two-dimensional shape called_____________.

Find the surface area of a sphere, whose radius is given as 11 cm.

Which of the following is a sphere?

Metallic spheres of radii 6 cm, 8 cm and 10 cm, respectively, are melted to form a single solid sphere. Find the radius of the resulting sphere.

Find the volume of sphere if r= 5 cm.

Calculate the volume of sphere if r= 3 cm.

 Complete:

If the ratio of the diameters of two spheres is 3 : 5, then the ratio of their surface areas will be_________.