find the distance travelled by a sound wave of frequency 20KHz, wavelength 1.7 cm in 10s.

Dear student,
Given, frequency, f= 20kHz= 20,000Hz
Wavelength,  λ= 1.7cm=0.017 m
Speed, v= Wavelength x frequency
v=  λ x f
v= 20000 x 0.017
v= 340m/s
Distance travelled by a sound wave of frequency 20 kHz in 10s =
D=speed x time 
D= 340 x 10
D= 3400 m
Regards