Question

what should be the dimensions and the shape of the classroom so that no echo can be produced there?​

Answer 1

Answer:For no echo to be produced in a classroom, the classroom should be square shaped with distance between the walls to be less than 17.2 m. Also, the ceiling should be curved shaped so that the reflection of sound wave is uniform throughout the room.

Explanation:

Answer 2

The distance between the opposite walls of the classroom should be less than 17.2m so no echo is heard.

There should be no dome shaped structure as it produces reverberation and multiple sounds.

Benches in the classrooms are also of sound absorbing materials and prevent echo of sound.