A girl on the beach sees 8 waves pass in 4 s. If the wavelength of each wave 1.2

Velocity = frequency x wavelength

              = x 1.2

              = 0.6 m/s

The velocity of wave is 2.4m/s.

Explanation:

First, find the frequency using the formula :

Let t = 4,

Next, given that each wave is 1.2m and there are 8 waves so the wavelength is :

Lastly, you have to use velocity formula :

Let f = 0.25Hz,

Let λ = 9.6m,

(Correct me if I am wrong)

2.43

Explanation:

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