Physics - Sound Wave Question with Solution | TestHub

An organ pipe ${\mathrm{P}}_1$ closed at one end vibrating in its first overtone and another pipe ${\mathrm{P}}_2$ open at the both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of the length of $P_1$ to that of $P_2$ is $\frac{3}{n}$ then $n=$ ?