The area A of four walls of a room of length l, breadth b and height h is given by the formula A = 2 (l + b) h. If l = 4.5 m, b = 3m and h = 4m, then A is equal to40 m^230 m^260 m^220 m^2 (2024)

FAQs

What is the formula for the area of 4 walls of a room? ›

The area A of four walls of a room of length l, breadth b and height h is given by the formula A=2(l+b)h.

If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, what the volume of the hall is? This 'hall' is a rectangular box. The volume of a rectangular box is L * W* H (length * width * height).

=2(90+75)=330m2.

The correct Answer is:50m2. Step by step video, text & image solution for The area of four walls of a room is 120 m^(2) . If the length of the room is twice its breadth and the height is 4 m, find the area of the floor. by Maths experts to help you in doubts & scoring excellent marks in Class 7 exams.

What is the total area of the four walls of a rectangular room (cuboid) and the ceiling, if the dimensions of the room are l = length, b = breadth, h = height? Hence, the answer is 2(l + b) x h + l x b.

To calculate the area of a wall, use the standard formula of Length x Width = Area. Next, use the same formula to record the individual area of windows and doors. Once you have all of these measurements down, subtract the area of the windows and doors from the total area of the wall.

A room is 10m×8m×5m. Area of 4 walls=2(l+b)h=2(10+8)(5)=180 sq. m. Area of 4 walls+area of floor = 180+80=260 sq.

Answer: Totale 4 wall area equal to l*h+b*h+l*h+b *h.

Area Formulas

Area of a rectangle is the length times the width. Area of a parallelogram is base times the height. Area of a trapezoid is one half the sum of the two bases times the height. Area of a circle is π times the square of the radius.

Calculation: Let the length and breadth of a room be l and b. ∴ The area of the four walls of the room is 54 m².

What is the area of four walls of a room whose length is 6m breadth is 5m and height is 4m? ›

∴ The area of the four walls of a room is 80 m2

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The area of the back wall is also 7m x 2m = 14 square meters. The area of each side wall is 3m x 2m = 6 square meters (since there are two side walls, the total area is 2 x 6 = 12 square meters). Therefore, the total area of the four walls of the room is: 14 + 14 + 12 + 12 = 52 square meters.

Multiply the length of one wall by 4 to calculate the perimeter of a square room, since all four sides of a square are the same length by definition. Think of the floor as the square. For example, suppose the length of one wall is 20 feet. 20 multiplied by 4 gives a perimeter of 80 feet.

Expert-Verified Answer

=2×3 (5+4) =54m^2 . Area of ceiling = (l×b) =20m^2 , Area of floor is equal to ceiling area as room is of cuboidal shape , so area is 20m^2. Area of 4 walls +area of ceiling =(54+20) m^2 =74m^2.

∴Total Surface area of the four walls=88sq. m.

Area Formulas

Area of a rectangle is the length times the width. Area of a parallelogram is base times the height. Area of a trapezoid is one half the sum of the two bases times the height. Area of a circle is π times the square of the radius.