#### Answer

$h=\dfrac{D^2}{k}$

#### Work Step by Step

$\bf{\text{Solution Outline:}}$
To solve the given equation, $
D=\sqrt{kh}
,$ in terms of $
h
,$ square both sides. Then use the properties of equality to isolate the variable.
$\bf{\text{Solution Details:}}$
Squaring both sides, the equation above is equivalent to
\begin{array}{l}\require{cancel}
(D)^2=\left(\sqrt{kh}\right)^2
\\\\
D^2=kh
.\end{array}
Using the properties of equality, the equation above is equivalent to
\begin{array}{l}\require{cancel}
\dfrac{D^2}{k}=h
\\\\
h=\dfrac{D^2}{k}
.\end{array}