If the external and internal radii of a hollow sphere be 6 cm and 3 cm respectively, then the volume (i.e, the material) of the sphere will be

The internal and external diameters of a hollow hemispherical vessel are 21 cm and 28 cm respectively. Find : volume of material of the vessel.

The external and internal diameters of a hollow sphere are 6 cm and 8 cm respectively. The sphere floats completely immersed in a liquid of density 1.2g*cm^(-3) . What is the density of the material of the sphere?

The external and internal radii of a hollow cylinder are 5 cm and 4 cm respectively. If the height of cylinder is 14 cm, then find its internal volume and total surface area.

The external and internal radii of a hollow cylinder are 5 cm and 4 cm respectively. If the height of cylinder is 14 cm, then find its internal volume and total surface area.

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 frac(2)(3) cm . find the diameter and curved surface area 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.

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

If the external dimeter of a hollow iron-sphere be 12cm and the thickness of it be 3cm , then what will be the volume of the sphere?

The internal and external radii of a hollow hemispherical bowl are 20 cm and 23 cm, respectively. What is the total surface area (in cm^(2) ) of the bowl?