The internal and external radii of a hollow sphere are 3 cm and 5 cm respectively. The sphere is melted to form a solid cylinder of height `2 2/3cm`. Find the diameter and the curved surface area of the cylinder.

The radius of a cylinder is 14cm and height is 20 cm. then- Find curved surface area.

The height and the diameter of a cylinder are 6 cm and 14 cm respectively. Find the area of the whole surface.

Find the volume and the surface area of a sphere of radius 5.6 cm.

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

Three solid metallic cubes of edges 6 cm.,8 cm.and 10 cm.respectivelt are melted to form a new cube.Find the volume and the surface area of the newly formed cube.

Find the height of a cylinder if- Permeter of the base is 160 m and the curved surface area is 1440 m^2

The radius of a cylinder is 14cm and height is 20 cm. then- Find total surface area.

The radius of a cylinder is 14cm and height is 20 cm. then- Find the volume.

A toy is in the shape of a right circular cylinder with a hemisphere on one end and a cone on the other. The radius and height of the cylindrical part are 5 cm and 13 cm respectively. The radii of the hemispherical and conical parts are the same as that of the cylindrical part. Find the volume and surface area of the toy if the total height of the toy is 30 cm.

A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of radius 6 cm.Find the height of the cylinder.