To find the surface area of the walls, take the total length and multiply by the height. For a square room that would be 4 * length * height. For a rectangular room then ((2 * length1) + (2 * length2)) * height. For a room of any shape, just set a start point, then measure all along the wall until you end up at the same place, then multiply by height.

For the floor and ceiling, basically the same thing, take length * width and that should be.

If the celing is sloped, or vaulted, then split it into flat areas and add them up. 3D floor plans

# How To Find The Surface Area In Square Feet If The Lenght Of The Cubic Is 4 Feet And The With Is 3 Feet And The Height Is 4 Feet?

The formula of the surface area of a cuboid is:

Surface Area = 2wl + 2lh + 2hw

Where:

w= Width

l= Length

h= height

In the question we are give that:

Width= 3 feet

Length= 4 feet

Height = 4 feet

Plugging in these values in the formula. We get:

A = 2(3)(4) + 2(4)(4) + 2(4)(3)

Solving:

A=2(12) + 2(16) + 2(12)

A=24 + 32 + 24

A= 80

So the surface area of the cuboid is 80

Surface Area = 2wl + 2lh + 2hw

Where:

w= Width

l= Length

h= height

In the question we are give that:

Width= 3 feet

Length= 4 feet

Height = 4 feet

Plugging in these values in the formula. We get:

A = 2(3)(4) + 2(4)(4) + 2(4)(3)

Solving:

A=2(12) + 2(16) + 2(12)

A=24 + 32 + 24

A= 80

So the surface area of the cuboid is 80