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Two car moving in opposite directions approach each other with speed of `22m//s` and `16.5m//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 `340m//s`].

A

`361 Hz`

B

`411 Hz`

C

`448 Hz`

D

`350 Hz`

Text Solution

Verified by Experts

`rarr v_(s)` `v_(0) larr`
`dot S rarr v dot O`
`f' = f ((v + v_(0))/(v - v_(s))) = (400) ((340 + 16.5)/(340 - 22)) = 448 Hz`
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