\begin{align*}


[other aligned equations here]


	V(h) &= \left\{
	\begin{array}{l l}
		\dfrac{\pi}{6} h^{3} & \textnormal{if 0 $\le$ h $<$ 2R}\\\\
		\dfrac{\pi}{24} (h^{3} + 12hR^{2}) & \textnormal{if 2R $<$ h $\le$ 10R}
	\end{array}
	\right.\\
\\
	\dfrac{dV}{dh} &= \left\{
	\begin{array}{l l}
		\dfrac{\pi}{2}h^{2} & \textnormal{if 0 $\le$ h $<$ 2R}\\\\
		\dfrac{\pi}{8}(h^{2} + 4R^{2}) & \textnormal{if 2R $<$ h $\le$ 10R}
	\end{array}
	\right.
\end{align*}