The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceilling at the rate of Rs 7.50 per `m^(2).`

The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of white washing its curved surface at the cost of Rs 210 per 100m^(2).

The slant height and base diamater of a conical tomb are 25 m and 14m respectively. Find the cost of with-washing its curved surface at the rate of Rs 210 per 100 m^(2).

Find the cost od digging a cuboidal pit 8 m long, 6m broad and 3 m deep at the rate of Rs 30 per m^(3)

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).

A verandah of width 2.25m is constructed all along outside a room which is 5.5m long and 4m wide. Find: the cost of cementing the floor of the verandah at the rate of Rs. 200 per m^2 .

A door of length 2m and breadth 1m is fitted in a wall. The length of a wall is 4.5m and the breadth is 3.6m [fig 11.6]. Find the cost of white washing the wall, if the rate of white washing the wall is rs20 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 length and breadth of a rectangular piece of land are 500m and 300m respectively. Find: (i) its area (ii) the cost of the land, if 1m^2 of the land costs rs10,000.