Radius; Height and Slant Height of Cone

A hollow sphere of internal and external radii 2 cm and 4 cm respectively is melted into a cone of base radius 4 cm. Find the height and slant height of the cone.

The height and slant height of a cone are 12 cm and 13 cm respectively. Find its volume.

If the height and slant height of a cone are 21cm and 28cm respectively.Find its volume.

The base radius and slant height of a cone are 8 cm and 2 sqrt(13)cm respectively. Find the volume of the cone.

If the radius and slant height of a cone are a r/2 and 2l. Then find its total surface area.

The radius and slant height of the cone are 5 cm and 10 cm respectively. Find the curved surface area. (pi=3.14)

The radius and slant height of a cone are 4 cm and 25 cm respectively. Find the curved surface area of that cone. (pi = 3.14)