If speed of infrasonics, audible and ultrasonics waves are $v_{i}, v_{a}$ and $v_{u}$ then.

v_{i} > v_{a} > v_{u}

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v_{i} = v_{a} = v_{u}

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v_{i} < v_{a} < v_{u}

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v_{i} > v_{a}, v_{u} > v_{a}

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Solution

The correct option is B $v_{i} = v_{a} = v_{u}$
The velocity of sound in air is fixed and it becomes the property of media in which it is travelling so velocity of all types of sound waves are same.

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If speed of infrasonics, audible and ultrasonics waves are vi,va and vu then.

The correct option is B vi=va=vuThe velocity of sound in air is fixed and it becomes the property of media in which it is travelling so velocity of all types of sound waves are same.

If speed of infrasonics, audible and ultrasonics waves are $v_{i}, v_{a}$ and $v_{u}$ then.

The correct option is B $v_{i} = v_{a} = v_{u}$
The velocity of sound in air is fixed and it becomes the property of media in which it is travelling so velocity of all types of sound waves are same.