Question

What is the speed of a wave in (m/s) with a 5 meter wavelength and a period of 20 seconds?

Answer 1

Answer: 0.25 m/s

Explanation:  Speed = wavelengt · frequency  

v = λf   and frequency is 1/period  f = 1/T

Then v = λ/T = 5 m / 20 s = 0.25 m/s