To determine the surface area we need to notice each face of the figure, here we have:
Two triangles with base 6 and height 8.
One rectangle of length 8 and width 7.
One rectangle of length 7 and width 7.
One rectangle of length 10 and width 7.
Now we need to find the area of ech of them and add them; then we have:
[tex]\begin{gathered} SA=2(\frac{1}{2}\cdot6\cdot8)+8\cdot7+7\cdot7+10\cdot7 \\ SA=48+56+49+70 \\ SA=223 \end{gathered}[/tex]
Therefore, the surface area is 223 square cm
