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  4. The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point, in the medium in 2 minutes, then its wavelength is:

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Q. The speed of a wave in a medium is $760\, m/s.$ If $3600$ waves are passing through a point, in the medium in $2$ minutes, then its wavelength is:

Waves

Solution:

We use frequency of wave is
$n=\frac{3600}{2 \times 60}\, Hz$
$\Rightarrow \lambda=\frac{v}{n}=\frac{760}{30}=25.3\, m .$