An echo is not heard in a small room. why ? give reason
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They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.

hopw it helps

answer: i think he can see forward ten seconds and move forward ten seconds but giorno can undo his actions with ger.

explanation: