Question

what are the condition to produce echo​

Answer 1

¶ Minimum Distance should be of 17.2 m

¶ And maximum =34.4

¶ Time period=0.1s

Answer 2

1) The distance between the sound source mad the reflecting surface must not be less than 17 m.

2)The time period between hearing the original sound and its echo should not be less than 0.1 of a second.

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