A car is fited with a device which produces sound of

Last updated: 6/8/2023

A car is fited with a device which produces sound of frequency 50 Hz There is no wind and speed of sound in still alr is 345 ms An observer moving towards car with speed of 1 hear sound of frequency 68 Hz The speed of the car is O 20 ms towards observer O 25 m towards observer O 30 m towards observer O 30 ms away from observer View