Solution
= Solution
Use the <gradient> value from (i) and the outward <normal vector> from (ii). The rate of change per unit distance is
$$
\boxed{D_{\hat{\mathbf n}}V=(24,3,-6)\cdot\frac{(1,1,0)}{\sqrt2}
=\frac{27}{\sqrt2}}.
$$
= Solution
Use the <gradient> value from (i) and the outward <normal vector> from (ii). The rate of change per unit distance is
$$
\boxed{D_{\hat{\mathbf n}}V=(24,3,-6)\cdot\frac{(1,1,0)}{\sqrt2}
=\frac{27}{\sqrt2}}.
$$