Let's see the given measurements on the rectangular prism.
To calculate the surface area of a rectangular prism with length l, width w, and height h can be calculated using the following formula.
S=2 l h+2 l w+2 h w
Each term has 2 in it because opposite faces on a rectangular prism have equal dimensions. We will substitute 12 feet for l, 6.4 feet for w, and 1.7 feet for h into the formula for the surface area and simplify.