Audible range of frequencies is 20 Hz to 20,000 Hz. Fin the range of wavelength corresponding to this frequency. Given, velocity of sound = 340 m/s.

Frequency = 20 Hz
Velocity = 340 m/s
Velocity =  Frequency x wavelength 
.^.. Wavelength =   Velocity  
                           Frequency
                        = 340
                            20
                       = 17 m

Frequency = 20,000 Hz
Velocity = 340 m/s
Wavelength =    Velocity  
                        Frequency
                   =    340   
                       20,000
                  = 0.017 m

Hence range of wavelength = 17 m to 0.017 m