For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.

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Manisha Agrawal

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📊 Building Technology and Architectural Planning

Q. For an echo to be distinguished as separate, it should reach the ear _________ of a second after the direct sound.

(A) one-fourth
(B) one-fifth
(C) one-eighth
(D) one-tenth

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✅ Correct Answer: (D) one-tenth

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