Answer: The frequency the wave is 10 Hz
Explanation:
Wave speed is defined as the product of its wavelength and frequency.
Mathematically,
[tex]\text{Wave speed}=\lambda\times \nu[/tex]
where,
Wave speed = 40 m/s
[tex]\lambda [/tex] = wavelength of the wave = 4 m
[tex]\nu [/tex] = frequency of the wave = ?
Putting values in above equation, we get:
[tex]40m/s=4m\times \nu\\\\\nu=\frac{40m/s}{4m}=10s^{-1}=10Hz[/tex]
Hence, the frequency of the wave is 10 Hz
