Question

sound waves of frequency 3000Hz and 4000Hz propagate through air at the speedof 330m/s and 340m/s respectively. justify your answer

Answer 1

velocity of sound depend upon frequency of wave and wavelength .
e.g
velocity =frequency x wavelength
you can see velocity is directly proportional to frequency of wave . it means if any wave frequency is large then velocity also large .
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now ,
in question first wave frequency is 3000Hz and 2nd wave 4000Hz .we see frequency of 2nd is greater then 1st so , velocity of 2nd is greater then 1st.
which is given , hence answer is correct .