Answer : Frequency = 50 Hz
Explanation :
It is given that,
Wavelength of a wave on a string,

The speed of the wave is, v = 60 m/s
We have to find the frequency of the wave.
We know that the speed of the wave is given by the product of the frequency of the wave and the wavelength.




So, the frequency of the wave is 50 Hz.
Hence, this is the required solution.