A person is standing in front of a wall and makes a sound. What should be the normal minimum distance between the person and the wall , so that the person hears echo?
[A] 6 meters
[B] 13 meters
[C] 20 meters
[D] 17 meters

Show Answer

Advertisement

Kindly help us to keep GKToday updated and error free. Use this form to report error or outdated information in questions. We shall rectify asap...