- Velocity (v) = 300 m/s

- Wavelength (λ) = 3 m

To find:

- Frequency (f)

Formula:

The formula that relates velocity, wavelength, and frequency of a wave is:

```

v = fλ

```

Calculation:

Rearranging the formula to solve for frequency (f), we get:

```

f = v/λ

```

Substituting the given values:

```

f = 300 m/s / 3 m

```

```

f = 100 Hz

```

Therefore, the frequency of the wave is 100 Hz.