Here's how to calculate the speed of a wave:

Formula:

Speed (v) = Wavelength (λ) * Frequency (f)

Given:

* Wavelength (λ) = 3 meters

* Frequency (f) = 0.1 Hz

Calculation:

v = 3 m * 0.1 Hz = 0.3 m/s

Answer:

The speed of the wave is 0.3 meters per second.