Answer:
v=700 m/s
Step-by-step explanation:
Given that,
The frequency of a wave is 35 Hz and its wavelength is 20 m
We need to find the speed of the wave. Let it is v. It is given in terms of frequency and wavelength as follows :
![v=f\lambda\\\\v=35* 20\\\\v=700\ m/s](https://img.qammunity.org/2021/formulas/biology/high-school/qba6o6bjrsxrjcfso5ux68zbryr7bk4nri.png)
So, the velocity of the wave is 700 m/s.