Velocity of the sound wave = 350 meters/second
Frequency of the sound wave = 430 Hertz
Then
Wavelength = speed / frequency
= 350/430
= 0.81
From the above deduction, it can be concluded that the correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that has actually come to your desired help.
