A sound wave of wavelength $30 c m$ completes $3$ oscillations in $2 m s$ , then what will be the wave velocity of sound wave?

450 m / s

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400 m / s

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300 m / s

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350 m / s

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Solution

The correct option is A $450 m / s$
$v = f λ$

$= \frac{3 \times 30 \times 10^{- 2}}{2 \times 10^{- 3}}$

$= 450 m / s$

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