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. For hearing an echo, the time interval between the
original sound and echo should be

(a) 1/10 of a second

(b) Less than 1/10 of a second

(c) More than 1/10 of a second

(d) None of these



. For hearing an echo, the time interval between the original sound and echo should be (a) 1/10 ..

Answer / guest

(c) More than 1/10 of a second

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