Answer
See the explanation below.
Work Step by Step
Divergence Theorem states that suppose $E$ defines a simple, solid region and $S$ is the boundary surface with positive orientation. If $F$ is a vector field that has continuous partial derivatives on an open region in $R^3$ over the region E, then: $\iint F \cdot dS= \iiint_E div\,F \,dV$.
