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)

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How do you find the area of a room with 4 walls? ›

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.

∴Total Surface area of the four walls=88sq. m. Was this answer helpful?

Hope, this will help you. Area of the four walls of a cuboid with length as l , width as b , and height as h =2lh +2bh=2h(l+b) .

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.

Formula used:

Area of four walls of a room = 2(l + b) × h, where 'l' is length of the room, 'b' is breadth of the room and 'h' is height of the room. Area of ceiling of a room = (l × b), where 'l' is length of the room and 'b' is breadth of the room.

Measure length of each wall including doors and windows. Find the total square feet of the wall(s) by multiplying ceiling height by total wall length.

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.

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.

The volume of a rectangular box is L * W* H (length * width * height). The area of the top is equal to the area of the bottom and each is calculated using the formula area = L * W.

What is the area of the four walls of a cubical room? ›

FORMULA USED:

Area of four walls = 2 H (L + B)

∴ The area of the four walls of the room is 54 m².

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First, measure the total length of the wall across in feet using a tape measurer. Then measure the height of the wall from floor to ceiling. Finally, multiply the total wall length by its height to calculate the square footage of the wall.

=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.

For example: In the above figure, each wall is 12' long with an 8' ceiling. Multiply 12 x 8 = 96 square feet for each wall, then multiply 96 x 4 (since there are four walls with 96 square feet each)= 384 total square feet for the room.

Walls. 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.

Multiply the length by the width and you'll have the square feet. Here's a basic formula you can follow: Length (in feet) x width (in feet) = area in sq.