Area of four walls of a room

The perimeter of a floor of a room is 30m and its height is 3m. Find the area of four walls of the room.

The area of four walls of room is given by A=2h(l+b). Make l as the subject of the formula. Find l when A=100m^(2) , h=5m, and b=4m.

The length of a room is (3x + 10) m and the breadth of the room is (2x + 5) m. The area of four walls of the room is (60x + 180) m2. What is the height of the room?

The area of the four walls of a room is 2640 sq. m and the length is twice the breadth and the height is given as 11 m. What is the area of the ceiling?

The area of the four walls of a room is 660 m^(2) and its length is twice its breadth. If the height of the room is 11 m, then area of its floor (in m^(2) ) is

The area of the four walls of a room is 120m2 and the length is twice the breadth. If the height of the room is 4m, then the area of the floor is (a) 48m2 (b) 49m2 (c) 50m2 (d) 52m2

Find the area of the four walls of a room whose length is 6m, breadth 5m and height 4m .Also find the cost of white-washing the walls,if the rate of white washing is Rs.5 per square meter.(Doors,Windows and other opening ignored)