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Two cars moving in opposite directions approach each other with speed of 22 ms-1 and 16.5 ms-1 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-1

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a

361 Hz

b

411 Hz

c

448 Hz

d

350 Hz

answer is C.

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Detailed Solution

The required frequency of sound heard by the driver of second car is given asv'=vv+vov-vsWhere v = velocity of soundvo = velocity of observer, i.e., second carvs = velocity of source, i.e., first carv'=400340+16.5340-22=400356.5318v'≈448 Hz

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Two cars moving in opposite directions approach each other with speed of 22 ms-1 and 16.5 ms-1 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-1