Barber's Problem (turn in this problem only) A high speed train passes a station at full speed while sounding its horn. A person standing on the platform hears the horn at 420 Hz as the train approaches and 300 Hz after it passes. Assuming that the speed of sound is 343 m/s; a. How fast is the train moving? b. What is the frequency of the horn as observed from the train.

Barber's Problem (turn in this problem only) A high speed train passes a station at full speed while sounding its horn. A person standing on the platform hears the horn at 420 Hz as the train approaches and 300 Hz after it passes. Assuming that the speed of sound is 343 m/s; a. How fast is the train moving? b. What is the frequency of the horn as observed from the train.