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# What is the Equation for area of a cuboid?

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## Related Questions

###### Asked in Geometry, Proofs

### How would you work out the total surface area of a cube or a cuboid?

The cube is a special case of the cuboid (where length = breadth
= height), so we will only consider the total surface area of a
cuboid.
Let the cuboid have length l, breadth b and height h.
Then the surface area of the cuboid consists of 2 l x b
rectangles, 2 b x h rectangles, and 2 l x h rectangles.
As such, the total surface area is 2bl + 2bh + 2lh = 2(bl +
bh + lh).