The minimum distance between the source of a sound and reflecting surface to hear an echo at $22^{\circ} C$ is

15.6 m

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16.8 m

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17.2 m

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18.4 m

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Solution

The correct option is C $17.2 m$
The minimum distance between the source of a sound and reflecting surface to hear an echo at $22^{\circ} C$ is $17.2 m$ .

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Q. The minimum distance between the source of sound and the reflecting surface necessary to cause echo is

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The minimum distance between the source of a sound and reflecting surface to hear an echo at 22 ∘C is

The correct option is C 17.2 mThe minimum distance between the source of a sound and reflecting surface to hear an echo at 22 ∘C is 17.2 m.

The minimum distance between the source of a sound and reflecting surface to hear an echo at $22^{\circ} C$ is

The correct option is C $17.2 m$
The minimum distance between the source of a sound and reflecting surface to hear an echo at $22^{\circ} C$ is $17.2 m$ .