To find the wavelength of a longitudinal wave (not latitudinal), you need to know the speed of the wave in addition to the frequency and amplitude. The formula to calculate the wavelength is:
Wavelength (λ) = Speed (v) / Frequency (f)
The speed of a wave depends on the medium through which it is traveling. If you have the speed of the wave, you can substitute it into the formula along with the given frequency to find the wavelength.
However, it's important to note that this formula applies to longitudinal waves, where the oscillations occur parallel to the direction of wave propagation, such as sound waves. If you are referring to a different type of wave, please provide more specific information so I can assist you accordingly.