Velocity of a water wave is 5.307 meters per second.
Step-by-step explanation:
The velocity of a water wave is found by the product of frequency and wavelength.
Frequency is defined as the rate at which a particular number pf wave oscillations travel per second. It is represented by 'f'.
Wavelength is defined by the distance between two points in between two crests or troughs. It is represented by 'λ'.
Velocity(v) = frequency(f) × wavelength(λ)
From the given data
frequency(f) = 0.87 Hertz per second
wavelength(λ) = 6.1 meters
Substituting the given values
velocity(v) = 0.87 × 6.1
velocity(v) = 5.307 Hertz per second.