The surface area of a three dimensional object is equal to the sum of the areas of all the faces. Juanita has a box that is 3.2 x 2.1 x 2.7 ft. We can use this information to find the area of all the faces.
There will be two faces that are 3.2 x 2.1
There will be two faces that are 3.2 x 2.7
There will be two faces that are 2.1 x 2.7
So the following expression can be used to find the surface area:
[tex]2(3.2)(2.1) + 2(3.2)(2.7) + 2(2.1)(2.7)[/tex]
The surface area is 42.06 ft^{2}
