Answer: 20 m/s
Explanation:
The speed [tex]v[/tex] of a wave is given by the following equation:
[tex]v=\frac{\lambda}{T}[/tex] (1)
Where [tex]\lambda[/tex] is the wavelength and [tex]T[/tex] the period of the wave.
In addition we know there is an inverse relation between the period of a wave and its frequency [tex]f[/tex] :
[tex]f=\frac{1}{T}[/tex] (2)
Substituting (2) in (1):
[tex]v=\lambda.f[/tex] (3)
Now we can find the velocity of the wave with the known given values applying equation (3):
[tex]v=(10m)(2Hz)[/tex] (4)
Finally:
[tex]v=20 \frac{m}{s}[/tex]
