The speed of a wave is calculated using the following formula:

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

Given:

* Wavelength (λ) = 0.2 m

* Frequency (f) = 1.5 Hz

Plugging these values into the formula:

* v = 0.2 m × 1.5 Hz

* v = 0.3 m/s

Therefore, the speed of the wave is 0.3 meters per second.