Answer:
50 Hz
Explanation:
The frequency of a wave is given by
[tex]f=\frac{v}{\lambda}[/tex]
where
v is the speed of the wave
[tex]\lambda[/tex] is the wavelength
In this problem,
v = 60 m/s
[tex]\lambda=1.2 m[/tex]
So the frequency is
[tex]f=\frac{60 m/s}{1.2 m}=50 Hz[/tex]
