Question

Suppose when you clap your hands you hear the echo a few seconds later. What can you say about the size of this room?

Answer 1

It's empty or fairly large, making the sounds from your hands bounce of the walls and therefore having it echo

Answer 2

Answer: The room is bigger than 17.2 meter

Explanation:

The echo can be defined as the sound that is when produced are reflected back back to the ear of the speaker.

The sound that is heard is reflected sound. The minimum distance that is required to produce an echo is 17.2 meters.

By hearing the echo we can conclude that the size of the room must be more than 17.2 meters.

Hence, the correct answer is more than 17.2 meters.