Question

A 0.25 m wave has a frequency of 686 Hz. What is the speed of the wave?

170 m/s

340 m/s

686 m/s

1,370 m/s

Answer 1

Speed = wavelength * Frequency
s = 686 /s * 0.25 m
s = 171.5 m/s

In short, Your Answer would be Option A

Hope this helps!