Two students stand in front of a long, vertical brick wall. Student A is 2.0 m from the wall. Student B is also 2.0 m from the wall but 6.0 m farther along the wall from A.
(i) Determine the extra distance that a sound pulse must travel to reach B after one reflection from the wall compared with the direct path.
(ii) Hence calculate the time delay between the direct and reflected sounds, taking the speed of sound in air to be 340 m s−1.