if you shout into the grand canyon, your voice travels at the speed of sound (340m/s) to the bottom of the canyon and back, and you hear an

if you shout into the grand canyon, your voice travels at the speed of sound (340m/s) to the bottom of the canyon and back, and you hear an echo. how deep is the grand canyon at a spot where you can hear your echo 5.2 seconds after you shout