The floor of a rectangular hall a perimeter 250 m. If the cost of painting the four walls at the rate of Rs 10 per `m^(2)` is Rs 15000, find the height of the hall.

The area of a circular playground is 22176 m^2 . Find the cost of fencing this ground at the rate of Rs 50 per metre.

It costs Rs 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If the cost of painting is at the rate of Rs 20 per m^(2), find: (i) inner curved surface area of the vessel, (ii) radius of the base, (iii) capacity of the vessel.

The inner diameter of a circular well is 3.5 m. It is 10m deep. Find the cost of plastering this curved surface at the rate of Rs 40 per m^(2).

Find the cost of fencing a square park of side 250 m at the rate of ₹ 20 per metre.

A hemispherical bowl made of brass inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per 100cm^(2).

A cylindrical pilar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs 12.50 per m^(2).

Find the cost of fencing a rectangular park of length 175 m and breadth 125 m at the rate of ₹ 12 per metre.

A rent is in the shape of a cylinder surmounted by a conical top. If the height and diameter of the cylindrical part are 2.1 m and 4m respectively , and the slant height of the top is 2.8m, find the area of the canvas used for making the tent. Also. find the cost of the canvas of the tent at the rate of Rs 500 "per"m^(2) ( Note that the base of the tent will not be covered with canvas. )

The diagonal of a rectangular field is 60 metres more than the shorter side. If the longer side is 30 metres more than the shorter side, find the sides of the field. OR Sum of the areas of two squares is 468m^(2) . If the difference of their perimeters is 24m, find the sides of two squares.