A true centrifugal casting operation needs to be performed horizontally to make copper tube sections with outer diameter of $\text{250 mm}$ and inner diameter of $\text{230 mm}$. The value of acceleration due to gravity, $g = 10\text{ m/s}^{2}$. If a $\text{G}$-factor (ratio of centrifugal force to weight) of $60$ is used for casting the tube, the rotational speed required is _________ $\text{rpm}$ ($\textit{round off to the nearest integer}$).
