Hello, I'm hoping somebody can give me some insight on how to solve this problem. This was a solid mechanics exam question and I wasn't able to finish it because I'm rather weak in math. 1. The problem statement, all variables and given/known data 2. Relevant equations Recall divergence theorem for part ii. ∫div(V)dA = ∫V⋅ndS where n is normal to the surface. 3. The attempt at a solution Part i. Not an issue, I can solve it easily. Part ii. I can apply divergence theorem no problem. For the n vector field I get: n1 = -e2 n3 = -e1 n2 = .707(e1 + e2) The problem is that I've been out of school for quite a while, and I can't remember how to successfully integrate over the surface (perimeter) now. I realize I need to break it up in to parts for each line of the surface, but it's been years since I've taken calculus.