A wall is 4.5 m long and 3 m high. It has two equal windows, each having form and dimensions as shown in Fig.37. Find the cost of painting the wall (leaving windows) at the rate of Rs 15 per `m^2` .

The wall of a room is 16 long and 6 m high. There is a long rectangular window in the wall measuring 3 m long and I m high. Find the cost of painting the wall at the rate of Rs 15 per sq. m.

A cylindrical pillar 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 wall is 11 m long and 4 m high. It has a door which is 2 m high and 1.5m wide. Find the cost of painting the wall at the rate of Rs 6 per sq. m.

The central hall of a school is 80m long and 8m high. It has 10 doors each of size 3m xx1. 6 m and 10 windows each of size 1. 5 m xx 1mdot If the cost of white-washing the walls of the hall at the rate of R s .1.20\ p e r\ m^2 is Rs. 2385.60, find the breadth of the hall.

The dining hall of a hotel is 75 m . Long 60m broad and 16 m high It has five doors 4m by 3 m each and four windows 3 m by 1.6 m each. Find the cost of: (i) papering its walls at the rate of rupees 12 per m ^(2) (ii) Carpeting its floor at the rate of rupees 25 " per " m^(2)

A swimming pool is 20m long 15m wide and 3m deep. Find the cost of repairing the floor and wall at the rate of Rs. 25per square metre.

The dome of a building is in the form of a hemisphere. Its radius is 63m. Find the cost of painting it at the rate of Rs. 2 per sq.m.

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

A rectangular garden is 124m long and 92 m wide. Find the cost of making a 3-m wide path araound it at the rate of Rs 160 per sq. m .

The dome of a building is in the form of a hemisphere. Its radius is 63dm. Find the cost of painting it at the rate of Rs. 2 per sq.m.