The back wall of an auditorium is 28.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall?
The speed of sound in the air is 343 m/s.
1/2 of this auditorium = 14 m
= .082 s
= 8.16 x 10-2 s