Question

A sound wave travels at a speed of 399 m/s, if wave length is 1.3meter what is the frequency of sound.

Answer 1

Here it is..
》s=_/\* f
》399=1.3 * f
》f=399/1.3=3.06 Hz

Answer 2

Formula :

Velocity = frequency × wavelength .

Given :

velocity = 399 m/s

wavelength = 1.3 m

399 m/s = 1.3 m × frequency

= > frequency = 399 m/s / 1.3 m

= > frequency= 306.923 /s

Answer:

306.923 Hz