The external and internal radii of a hollow cylinder of height 11.5 cm are 5.3 cm and 3.8 cm respectively. It is melted and turned into a solid cylinder of height 7.3 cm . Find the radius of the latter in nearest milimetres.

The external and the internal radii of a hollow right circular cylinder of height 15 cm are 6.75 cm and 5.25 cm respectively. If it is melted to form a solid cylinder of height half of the orignal cylinder, then the radius of the solid cylinder is-

The inner and outer radii of a hollow cylinder are 15 cm and 20 cm, respectively. The cylinder is melted and recast into a solid cylinder of the same height. Find the radius of the base of new cylinder.

The inner and outer radii of a hollow cylinder are 15 cm and 20 cm, respectively. The cylinder is melted and recast into a solid cylinder of the same height. Find the radius of the base of new cylinder.

The radii of internal and external surfaces of a hollow spherical shell are 3 cm and 5 cm respectively. It is melted and recast into a solid cylinder of diameter 14 cm. Find the height of the cylinder.

The radii of the internal and external surfaces of a hollow spherical shell are 6 cm and 4 cm respetively. If it is melted and recast into a solid cylinder of height 4/3 cm, find the diameter of the cylinder

The radius of the internal and external surface of a hollow spherical shell are 3cm and 5cm respectively. If it is melted and recast into a solid cylinder of height 2 2/3c mdot Find the diameter of the cylinder.

The radius of the internal and external surface of a hollow spherical shell are 3cm and 5cm respectively. If it is melted and recast into a solid cylinder of height 2 2/3c mdot Find the diameter of the cylinder.

The internal and external diameter of a hollow hemispherical shell are 6 cm and 10 cm respectively. If it is melted and recast into a solid cylinder of diameter 14 cm, then find the height of the cylinder.

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.