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Suppose a sound wave is travelling at a speed of $339 m / s$ and its wavelength is $1.5 cm$ then what will be its frequency?

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22.8 kHz

23.6 kHz

22.6 kHz

21.6 kHz

answer is C.

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Detailed Solution

The frequency is

22.6 kHz

.
Given,
The speed of a sound wave,

v = 339 m / s

.
The wavelength of the sound wave,

λ = 1.5 cm

.
⇒

λ = 0.015 m

Frequency of a sound wave is given by,

f = \frac{v}{λ}

⇒

f = \frac{339}{0.015}

⇒

f = 22600 Hz

⇒

f = 22.6 kHz

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