To find the wavelength, we can use the formula:
wavelength = speed / frequency
Given that the number of waves passing through the medium in one second is the frequency, and the speed is 20 m/s, we can substitute the values into the formula:
wavelength = 20 m/s / 20 waves/s
The waves per second cancel out, leaving us with:
wavelength = 1 m
Therefore, the wavelength of the waves passing through the medium in this scenario would be 1 meter.