Question 72
The frequency of a sound wave is 25 Hz and its wavelength is 4 m. What is the time taken by the sound wave to travel a distance of 200 m ?
Solution
Since we know that :-
V=fλ
By using the above formula we will find velocity (v):-
V=25×4
V=100m/s
So as we know that:-
$$V=\frac{S}{T}$$
Therefore:-
$$T=\frac{S}{V}$$
By subsituting the values in above equation:
$$T=\frac{200}{100}$$
T=2seconds
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