The dimensions of a class room are 15 ft `xx`10 ft `xx` 11 ft. The area of four walls is ______.

The dimensions of a shop are 12 ft xx 8 ft xx 5 ft. The area of four walls is _______

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 inner dimensions of a hall are 40 ft xx 20 ft xx 30 ft. The hall contains 2 doors of size 5 ft xx 10 ft each and 4 windows of size 5 ft xx 5 ft each. If the inner walls of the hall are to be fixed by tiles of size 1 ft. xx 1, then find the number of tiles required.

The inner dimensions of a swimming pool are 50ftxx20ftxx10ft . The inner sides and the floor of the swimming pool have to be fixed with tiles of size 2ftxx2ft . Find the cost of fixing the tiles at the rate of rs.15 each.

The floor dimensions of a conference hall are 100 ft xx 20 ft. Find the number of tiles required for flooring with square tiles of side 2 ft each.