Hey there Budd!
Sense this is a 3 dimensional shape, we would add up the volume, by then multiply it by 2, because . . . it is a 3-d shape.
But, now that we see that some part's of this shape carries more than 2 sides of the same shape, we cannot just add them and then multiply them, we have add them manually pretty much.
So, from what I got, I got 54 cm^2, which in this case, the correct answer to this question would be "none of the above" because 54 is not one of your options.
Hope this helps! :)
