The speed of the water waves is 3 m/s.
The wave speed is the distance a wave travels in a specific amount of time, such as the number of meters it travels in a second. The formula to calculate wave speed is given as V = f×λ. V is the speed or velocity in m/s, f is the frequency in hertz (Hz), and λ is wavelength in m.
Here, given the time period (T) is 5 s and the wavelength is 15 m.
First, the frequency can be calculated using the formula, f = 1/T.
f=1/5=0.2
Then, the wave speed is,
V=0.2×15=3 m/s
The answer is 3m/s.
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