Gravitation

If earth has a mass nine times and radius twice to that of a planet P. Then \(\frac{v_{e}}{3} \sqrt{x} \mathrm{~ms}^{-1}\) will be the minimum velocity required by a rocket to pull out of gravitational force of \(\mathrm{P}\), where \(v_{e}\) is escape velocity on earth. The value of \(x\) is