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 is 340 m/)
(a) 361 Hz
(b) 411 Hz
(c) 448 Hz
(d) 350 Hz
Correct option (c) 448 Hz
Explanation :
The required frequency of sound heard by the driver of second car is given as
where v = velocity of sound
v0 = velocity of observer, i.e., second car
vs = velocity of source i.e., first car
