Answer:
1150 m
Explanation:
The person hears the echo after 6.8 seconds, which means it takes the sound wave 3.4 seconds to reach the other side of the canyon and 3.4 seconds to return to the person.
Distance = speed × time
d = vt
d = (338.1 m/s) (3.4 s)
d = 1150 m
