Question

Distance between 5th and 15th crest is 20cm what is wavelength of sound

Answer 1

heyaaa.
here is ur answer.
15–5=10.

There are 10 wavelengths.

Total distance = 20 cm.

Therefore each wave has a length =

20/10 = 2 cm.
hope it helps..

Answer 2

The wavelength of the sound is 2 cm.

Explanation:

It is given that, distance between 5th and 15th crest is 20 cm. We need to find the wavelength of sound.

We know that the distance between two crest and trough is called wavelength of a wave. Distance between 5th and 15th crest will be 10 λ. So,

$10\lambda=20\ cm$

$\lambda=2\ cm$

So, the wavelength of the sound is 2 cm. Hence, this is the required solution.

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