To find the frequency of the waves, you can use the formula:
\[ \text{Frequency} = \frac{\text{Wave Speed}}{\text{Wavelength}} \]
Given:
- Wave speed = 4.0 m/s
- Wavelength = 2.5 m
Now, plug in the values:
\[ \text{Frequency} = \frac{4.0 , \text{m/s}}{2.5 , \text{m}} = 1.6 , \text{Hz} \]
Therefore, the frequency of the waves is 1.6 Hz.