Question

(iv) We can not hear an ECHO produced in a classroom ​

Answer 1

Answer:

The distance between two walls of a classroom is less than 17.2 m. Therefore the time taken for the echo to reach our ears is less than 0.1 s. Thus we are unable to distinguish between the original sound and the echo produced. Hence echo can't be heard in a classroom

Answer 2

Answer:

Echo is a sound produced when the original sound is reflected by walls of a given room.

In case of a classroom, no echo is produced because the learners and the furniture block the sound from reaching the wall hence no bouncing back of sound.

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