In case of closed organ pipe, which harmonin the `p^(th)` overtone will be

The second overtone of a closed organ pipe is in unison with the fourth overtone of the open organ pipe. Calculate the ratio of length of the two pipes.

Fifth overtone of closed organ pipe is in unison with fifth overtone of open organ pipe. The ratio of their lengths is

Fifth overtone of closed organ pipe is in unison with fifth overtone of open organ pipe. The ratio of their lengths is

The frequency of the first overtone of a closed organ pipe is the same as that of the first overtone of an open pipe. What is the ratio between their lengths ?

First overtone frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe. Further nth harmonic of closed organ pipe is also equal to the nth harmonic of open pipe, where n and m are