I’m not sure what the question is, if there is one but I did find a similar one where the question was …
the lowest pitch that the average human can hear has a frequency of 20.0 Hz. if sound with this frequency travels through air with a speed of 331 m/s what is it's wavelength?
So if that is your question then the answer is
16.55m
λ=wave velocity/frequency
λ=331 m/s / 20.0 Hz
λ=16.55 m
Hope this Helps you.
