Contextual Applications of Differentiation · Superchallenge problem

A hemispherical bowl has radius $6$ ft and is being filled with water at $4$ ft$^3$/min. The volume of water when the depth is $h$ is $V(h)=\dfrac\pi3h^2(3R-h)$, where $R=6$ is the bowl's radius. Find the rate at which the depth is rising when $h=2$ ft.