State True or False:
To find the cost of painting a wall we need to find the perimeter of the wall.

Write True or False: To find the cost of a frame of a picture, we need to find the perimeter of the picture.

The length and breadth of a rectangular wall are 30 metre and 24 metre respectively and the cost of painting the wall is Rs. 3,240. Find the rate of painting per square metre.

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 dimensions of a room are 20 ftxx 15 ftxx 12ft . Find the cost of painting the walls of the room at rupees 20 per sq. ft.

The length of a room is 50 per cent more than its breadth.The cost of carpeting the room at the rate of Rs38.50m^(2) is Rs924 and the cost of painting the walls at the rate of Rs 5.50 per m^(2) is 1,320. Find the dimensions of the room.

The length of a rectangular wall is l cm, the breadth is 2b. Find the area of the wall.

A door of length 1m and breadth 0.5m is on a well.The length of the wall is 4.5m and the breadth is 3.6m as shown in Fig.5. Find the cost of white washing the wall if the rate of white washing the wall is Rs 20per m^(2) .

The floor of a rectangular hall has a perimeter of 250m .Its height is 6m. Find the cost of painting its four walls (including doors,etc.) at the rate of Rs.6 per square metre.

The floor of a rectangular hall has a perimeter 250 m. If the cost of painting the four walls at the rate of R s" "10" "p e r" "m^2 is Rs 15000, find the height of the hall. [Hint : Area of the four walls = Lateral surface area.]