oof did u ever find out the answer...
Surface area is what it seems to be. All of the area of the solid's faces together. Like a cube, just find the areas of all of the squares that make the cube then add them together.
Since OC is perpendicular to AB, the line AB gets split evenly. So

So AB=2*6.7=13.4
Ans: Option B, 13.4 units
Answer:
G:10
Step-by-step explanation:
If I am wrong I'm sorry.