Question

A person stands at a point 358 m

 in front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? (Assume the speed of sound is 344 m/s.)

Answer 1

$d = 358\ m\\ v = 344\ m/s$

$t=\dfrac{2d }v = \dfrac{2× 358}{344} = 2.08s$