A boat at anchor is racked by waves whose consecutive crests are 125 m apart. The velocity of the wave of the moving crests is $$ 25ms^{-1} $$, What is the frequency of the rocking of the boat?

Velocity = Frequent $$\times$$ Wavelength

Frequency = $$\frac{25}{125}$$ =0.2 Hz

So, the answer would be option a)0.2 Hz.

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