A car P approaching a crossing at a speed of 10 m s sounds a

Last updated: 6/24/2023

A car P approaching a crossing at a speed of 10 m s sounds a horn of frequency 700 Hz when 40 m in front of the crossing Speed of sound in air is 340 m s Another car Q is at rest on a road which is perpendicular to the road on which car P is reaching the crossing see figure The driver of car Q hears the sound of the horn of car P when he is 30 m in front of the crossing The apparent ord by the driver of car Q is