A standing wave of the third harmonic is induced in a stopped pipe of length 1.2 m. The speed of sound through the air of the pipe is What is the frequency of the sound produced by the pipe?

Question

DuarteME · Answer

It would be helpful if you could provide the speed of sound given in the problem. $\ddot{\smile}$

In any event, you should remember what a 3rd harmonic is and how its wavelength relates to the total length of the pipe. Perhaps a sketch of the wave and the pipe would be useful in order to do that.