The internal and external diameters of a hollow hemispherical vessel are 24 cm and 25 cm respectively. Find the cost of painting the vessel all over, at the rate of 5 paise per sq.cm.

The internal and external diameters of a hollow hemisphere vessel are 42 cm and 45.5 cm respectively. Find its capacity and also its outer curved surface area.

The internal and external diameters of a hollow hemispherical shell are 6 cm and 10 cm respectively.It is melted and recast into a solid cone of base diameter 14 cm. Find the height of the cone so formed

The radius and height of a conical vessel are 7 cm and 25 cm respectively. Its capacity in litres is :

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.

A hemispherical bowl made of brass has inner diameter 105 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100 cm^2 .

A solid is composed of a cylinder with hemispherical ends. If the whole length of the solid is 108 cm and the diameter of the hemispherical ends is 36 cm, find the cost of polishing the surface of the solid at the rate of 10 paise per cm^2 .

A cylindrical vessel open at the top has a dimeter 20 cm and height 14 cm. Find the cost of tin-plating it on the inside at the rate of 70 paise per 100 cm^2 .

A container opened from the top is made up of a metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends as 8 cm and 20 cm, respectively. Find the cost of the milk which can completely fill the container, at the rate, of Rs 20 per litre. Also find the cost of metal sheet used to make the container, if it costs Rs 8 per 100 cm^2 . (Take pi = 3.14.)