Answer:
38m^2
Explanation:
We are solving the surface area of a rectangular prism that has been cut in half diagonally.
Our equation for this is
S = 2(lw + lh + wh)
Plug in our info
S = 2(10(1.5) + 10(2) + 1.5(2))
Work inside parentheses
S = 2(15 + 20 + 3)
S = 2(38)
S = 76
Our original surface area would be 76 if this were a regular rectangular prism, but its not! It's cut in half.
So, 76/2 is 38.