#1**+1 **

a is length

b is height

11 is width

**Surface Area of a Rectangular Prism = 2ab + 2bc + 2ac**

SA = 2(7)(8) + 2(8)(11) + 2(7)(11)

SA = 442

Just a clarification, the dimensions of the shape are not that of a cube but that of a rectangular prism. The formula to find the surface area of a cube is 6a^{2} where a is the side length.

Hope this helped :)

Guest Apr 20, 2017