Speed of sound in the air (at $20^{0} C$ ) is

3 \times 10^{8} m / s

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30

crore metre per second

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343 m / s

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242 m / s

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Solution

The correct option is C $343 m / s$
Speed of light is very high i.e., $3 \times 10^{8} m / s$ and the speed of sound in the air (at $20^{0} C$ ) is $343 m / s$ .

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Sound is travelling in air at a speed of 343 m/s. The wavelength of the sound wave is 0.1 cm. Humans can easily perceive this sound.

A sound is travelling in air at a speed of 343 m/s. The wavelength of the sound wave is 0.1 cm. This sound is audible to humans.

If a sound wave of wavelength 0.1 cm is traveling in air at a speed of 343 m/s. Is it audible to human beings?

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