A man is travelling in a train towards the station with a speed of 50 m/s. calculate the apparent frequency heard by him of whistle which is blown at the station with a frequency 200 Hz. Velocity of sound in air is 350 m/s.

Explanation

Here is this case, observer is moving and source is at rest. Therefore, apparent frequency heard by the observer is
`v.=((V+V_(0))/(V))v`
`=((350+50)/(350))xx200`
`=(400)/(350)xx200=228.57Hz`