The speed of a wave can be calculated using the formula:
speed (v) = wavelength (λ) x frequency (f)
In this case, the wavelength (λ) is given as 3 meters (m), and the frequency (f) is given as 0.1 hertz (Hz). Plugging these values into the formula, we get:
speed (v) = 3 m x 0.1 Hz
Calculating the product, we find:
v = 0.3 m/s
Therefore, the speed of the wave is 0.3 meters per second (m/s).