Suppose you volunteer for Engineers without Borders. You are tasked to design a waste tank where the volume of waste (liquid) can be computed as: V = pi * h^2 * (3R - h)/3 where h = waste depth [m], R = radius [m], and V = volume [m^3]. If R = 2.8m, what depth must be used so that the tank holds 28 m^3 waste