Correct Answer: Option A

Explanation

\(V = \frac{Distance}{time}\)

= \(\frac{50cm}{2s}\)

= 25 cms\(^{-1}\).

\(V = f \lambda\)

\(f = \frac{V}{\lambda}\)

\(f = \frac{25}{5}\)

= 5 Hz

There is an explanation video available below.

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