Question

To hear an echo, the total distance covered by sound from the point of generation to the reflecting surface and back should be atleast ____________.

विकल्प

• 36 m

• 17.2m

• 34.4m

• 19 m

Answer 1

To hear an echo, the total distance covered by sound from the point of generation to the reflecting surface and back should be atleast 34.4m.