Question

a man standing 48 M away from a wall fires a gun calculate the time after which an echo is heard the speed of sound in air is 320 M per second​

Answer 1

Velocity=distance/ time

Then,

Time=distance/velocity

Distance=48M

Velocity=320M/S

Time=48/320

=0.15s

Answer 2

Answer:

velocity= distance/time

distance= 48 m

velocity= 320m/s

Explanation:

time = 48/320 = 0.15 *2 (because it is an echo which is heard)

therefore the answer is 0.30sec