Two cars moving in opposite directions approach each other with speed of 22 m/s and 16.5 m/s respectively. The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/s]:
350 Hz
361 Hz
411 Hz
448 Hz
As we learnt in
Frequency of sound when source and observer are moving towards each other -
- wherein
Speed of sound
Speed of observer
speed of source
Original frequency
apparent frequency
Option 1)
350 Hz
This option is incorrect.
Option 2)
361 Hz
This option is incorrect.
Option 3)
411 Hz
This option is incorrect.
Option 4)
448 Hz
This option is correct.