A sound wave travels by a speed of $330 m s^{- 1}$ in air. If the wavelength of the wave is $110 c m$ , the frequency of the wave is _______.

100 H z

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200 H z

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300 H z

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400 H z

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Solution

The correct option is C $300 H z$
Given,
Speed of sound n air, $v = 300 m s^{- 1}$
Wavelength, $λ = 110 c m = 1.1 m$
Frequency, $f$
We know,
$v = f λ$

$⟹ f = \frac{v}{λ}$

$⟹ f = \frac{330}{1.1}$

$f = 300 H z$

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