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 330m/s)

A. 600m
B. 400m
C. 330m
D. 328m
E. 165m

Correct Answer:

Option C – 330m

Explanation

= vt/2 = (330×2)/2 = 660/2 = 330m