The radius of a sphere is 21cm, what is the surface area of the sphere?

Radius of a sphere is 14 cm. Find the surface area of the sphere.

If the radius of a sphere is 2cm, then the curved surface area of the sphere is equal to ……. .

The radius of a sphere is 1.23 cm. What is its surface area?

The radius of a sphere is 7 cm. Find its surface area.

The radius of a solid sphere is measured to be 11.24 cm. What is the surface area of the sphere to appropriate significant figures?

The radius of a sphere is 21 cm. calculate its surface area and volume.

The radius of a solid sphere is measured as11.24 cm.What is the surface area of the sphere to appropriate significant figures ?

If a sphere is cut into two hemispheres whose total surface area is 90 cm^2 , then what is the surface area of sphere ?