A closed organ pipe of length L and an open organ pipe contain...

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 both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is $\dfrac{x}{3}L\sqrt{\dfrac{{ρ}_{1}}{{ρ}_{2}}}$, where $x$ is _______.

(Round off to the Nearest Integer)