Question: A person P is 600 m away from the station when train is approaching station with 72 km/h, it blows a...

Question

A person P is 600 m away from the station when train is approaching station with 72 km/h, it blows a whistle of frequency 800 Hz when 800 m away from the station. Find the frequency heard by the person. Speed of sound = 340 ms^–1–

Answer 1

Solution

n_app = n = $\frac { 340 } { 340 - 16 }$ × 800 = 839.5