A closed organ pipe of length L and an open organ pipe contain gases of densities ρ_1 and ρ_2 respectively. The compressibility of gases are equal in…

A closed organ pipe of length $\displaystyle L$ and an open organ pipe contain gases of densities $\displaystyle \rho_1$ and $\displaystyle \rho_2$ respectively. The compressibility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is $\displaystyle \frac{x}{3} \mathrm{~L} \sqrt{\frac{\rho_1}{\rho_2}}$ where $\displaystyle x$ is \_\_\_\_. (Round off to the Nearest Integer)