Question

If a wave is traveling at 200 m/s and its wavelength is 0.5 meters, what is the frequency of the
wave?

Answer 1

The frequency of the  wave = 400/s

Further explanation

Given

v=200 m/s

λ=0.5 m

Required

The frequency of the  wave

Solution

Frequency (f): number of waves in one second

The frequency is inversely proportional to the wavelength

$\tt f=\dfrac{v}{\lambda}\\\\f=\dfrac{200~m/s}{0.5~m}\\\\f=400/s$