A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (Th...

A man stands in front of a tall wall and produces a sound. If he receives the echo of the sound two seconds later, calculate his distance from the wall. (The speed of sound in air is 330ms^-1)

Answer Details

When a sound wave travels and hits a surface, it reflects back as an echo. The time taken for the echo to return to the source is twice the time taken for the sound to travel from the source to the reflecting surface. Let's call the distance between the man and the wall "x". The sound travels the distance "x" to the wall and then reflects back to the man another distance "x". So, the total distance traveled by the sound is 2x. We know that the speed of sound in air is 330ms^-1. Using the formula, distance = speed x time we can write the equation as follows: 2x = 330 x 2 Simplifying this equation, we get: 2x = 660 Dividing both sides by 2, we get: x = 330 Therefore, the distance between the man and the wall is 330 meters. So the correct answer is: 330m.