A car is fitted with a device which produces sound of

Last updated: 6/8/2023

A car is fitted with a device which produces sound of frequency 60 Hz There is no wind and speed of sound in stil air is 345 m s 1 An observer moving towards car with speec of 12 m s 1 hear sound of frequency 68 Hz The speed of th car is 20 m s 1 towards observer 25 m s1 towards observer 30 m s 1 towards observer 30 m s 1 away from observer