Question

Hello.........friend help me



a man standing 25 m away from the wall produces sound and receives these are reflected sound...
a)calculate the time of 4 when he received the reflected sound is a speed of sound in air is 350 ms-1
2)

Answer 1

hey dear. your answer is here...

v=2d/t

350=2*×25/t
t=50/350
t= 1/7
t=0.14 sec

Answer 2

Hello...

Distance(d)=25m.
Speed of sound(v)=350m2-1


=>Time(t)=2d/V
=>Time=2×25m/350ms-1 (m and m cancel)
=>Time=1/7s
=>Time=0.143s.


Thanks!!!