Two cars moving in opposite directions approach each other with speed of 22 m/ and 16.5 m/ respectively. The driver of the first car blows a *** having a frequency 400 Hz. The frequency heard by the driver of the second car is [velocity of sound 340 m/] :-
(1) 361 Hz (2) 411 Hz (3) 448 Hz (4) 350 Hz
