The wavelength of the wave is 5 meters.The formula for solving wavelength is [tex]wavelength = \frac{speed}{frequency}[/tex][tex]v[/tex] is the speed of the wave (20 m/s),[tex]f[/tex] is the frequency of the wave (4 Hz),λ is the wavelength (in meters, m).λ = [tex]\frac{v}{f}[/tex]λ = [tex]\frac{20 m/s}{4 Hz}[/tex]λ = 5
formula for wavelength: Wave speed/Frequency20/4=5