Calculate the minimum distance from a reflecting wall at which a person must stand to…

PHYSICS · Subjective · CBSE · Physics · Sound · Sound

Problem

Calculate the minimum distance from a reflecting wall at which a person must stand to hear a distinct echo. Assume the speed of sound in air is

343\,\text{m/s}

and that a minimum time gap of

0.10\,\text{s}

is needed between the original sound and the echo.