Question

If the speed of sound in air is 340 m/s, the length of the organ pipe, open at both ends, that can resonate at the fundamental frequency of 136 Hz, would be:

A) 0.625 m 

B) 0.750 m 

C) 1.25 m 

D) 2.5 m 

E) 3.75 m

Answer 1

The correct option is: (C) 1.25 m 

Explanation:

For an open–open pipe the harmonic frequency is given by