Question

A man standing 48m away from a wall fires a gun. The echo is heard after 0.3 s .What is the speed of the sound

Answer 1

distance (d) = 48 m
time taken (t) = 0.3 seconds

therefore, using v=2d/t
where v is the velocity or speed of sound

v = 2x48 / 0.3
v = 20x16
v = 320 m/s

Therefore, the speed of sound is 320 m/s