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 6a2 where a is the side length.
Hope this helped :)
