# Surface area of rectangular box?

A rectangular box has a square base and a closed top with dimensions x=length and h=height. The surface area in terms of x and h

### 6 Answers

- Anonymous1 decade agoBest Answer
The formula for the surface area of a rectangular prism is:

SA = 2lh + 2wh + 2lw

However, since this has a square base, l = w. Therefore,

SA = 2lh + 2lh + 2l^2

If x = length and h = height, substitute!

SA = 2xh + 2xh + 2x^2

==> SA = 2x^2 + 4xh

Therefore, the surface area in terms of x and h is 2x^2 + 4xh.

Hope this helps.

- MadhuLv 44 years ago
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This is just a guess there are 3 different size area the one face open X 2 the other two X 4, Add them together everyone is forgetting surface inside of box

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- sean bLv 51 decade ago
the area of a serface i its length times its with

for total surface are find the area of each face since the top and bottom faces are square their area is x^2 for each

there are 4 side faces each with xh as their area

so add up all six giving

x^2+x^2+xh+xh+xh+xh

or

2x^2+4xh

- 1 decade ago
x * h = area

width * height = area

width * height * length = volume