While hiking through a canyon...?

Question

...Noah Formula (I know... haha) screams. An echo is heard 1.6 seconds after he lets out the scream. The speed of sound in air is 345 m/s. Calculate the distance from Noah to the nearby canyon wall the echo bounced off of.

Answer 1

The sound took 1.6 seconds to travel to the end of the canyon and back. This means that it took 0.8 seconds for the sound to travel to the end.

0.8 seconds * 345 m/s = 276 meters.