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In which one of the following locations can a person hear the echo of a sound?

In which one of the following locations can a person hear the echo of a sound?
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In which one of the following locations can a person hear the echo of a sound?

User Tecman
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6 votes

Answer:

at least 16.6 meters of the reflecting surface

Step-by-step explanation:

User Pnsadeghy
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5 votes
what are the choices ?
User Brad Albright
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7.8k points
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