Cylindrical Tank Volume Problem

A cylindrical tank has a radius of $r$ meters and a height of $h$ meters. The volume $V$ of the cylinder can be expressed as $V = ho imes\frac{22}{7} r^2 h$, where $\rho$ is a constant that represents the material density of the liquid stored in the tank. If the volume of the tank is 500 cubic meters and the height of the tank is twice its radius, find the value of the radius when both the radius and height are expressed in meters.

Express your answer in decimal form.