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A racing car moving towards a cliff, sou...

A racing car moving towards a cliff, sounds its horn. The driver observes that the sound reflected from the cliff has a pitch one octave higher than the actual sound of the horn. If `v` is the velocity of sound, then the velocity of the car is

A

`v/2`

B

`v/(sqrt2)`

C

`v/4`

D

`v/3`

Text Solution

Verified by Experts

The correct Answer is:
D
In case of reflection from a stationary cliff,
`f'=((v+v_(0))/(v-v_(0)))f=2fthereforev_(0)=v/3`
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