A boy standing in front of wall at a distance of `85 m` produces `2` claps per second.
Channel: Doubtnut
Date: 2020-07-26

A boy standing in front of wall at a distance of `85 m` produces `2` claps per second. He notices that the sound of his clapping coincides with the echo. The echo is heard only once when clapping is stopped. Calcualte the speed of sound.