Physics
Grade-8
Easy

Question

If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?

  1. 2 s
  2. 3 s
  3. 1 s
  4. 9 s

hintHint:

Distance= speed × time

The correct answer is: 2 s


    • Distance= speed × time.
    • Total distance travelled by the sound for echo is 2d = 2×3=6m.
    • Velocity of sound is 3m/s
    • Therefore, 6= 3×time
    • Time= 6/3 = 2 second.
    • So, the correct option is a.

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