To find the speed of the waves, we can use the formula for wave speed, which is given by:
\[
\text{Wave Speed} = \text{Wavelength} \times \text{Frequency}
\]
First, we need to determine the wavelength and the frequency of the waves.
1. **Wavelength (\(\lambda\))**: This is the distance between successive wave crests. From the problem, we are given that the distance between each wave crest is 2 meters:
\[
\lambda = 2 \, \text{meters}
\]
2. **Frequency (f)**: The frequency of the waves can be determined by how many waves pass by in a certain amount of time. We know that 2 waves pass by in 4 seconds, so the frequency can be calculated as:
\[
f = \frac{\text{Number of waves}}{\text{Time}} = \frac{2 \, \text{waves}}{4 \, \text{seconds}} = 0.5 \, \text{Hz}
\]
Now we can calculate the wave speed:
\[
v = \lambda \times f = 2 \, \text{meters} \times 0.5 \, \text{Hz} = 1 \, \text{meter/second}
\]
Thus, the speed of the waves is:
\[
\boxed{1 \, \text{m/s}}
\]