Question

An echo is returned in 3 s. If the speed of sound is 342 m/s, then the distance between the source of sound and the reflecting body is *​

Answer 1

Answer:

Speed of sound (v) = 342 ms-1

Echo returns in time (t) = 3 s

Distance travelled by sound = v × t = 342 × 3 = 1026 m

In the given interval of time, sound must travel a distance that is twice the distance of the reflecting surface and source.

Therefore, the distance of the reflecting surface from the source =1026/2 = 513 m.

Answer 2

Answer:

Correct option is

513 m

Explanation:

• Time taken by sound to travel from the source to the reflecting surface,
• t= 2/3=1.5s
• speed, v=342ms −1
• Distance of reflecting surface from the
• source s=vt=342×1.5=513m.

I hope this may help you