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A police car moving at 22 m//s, chase a ...

A police car moving at `22 m//s`, chase a motoclist. The police man has horn at `176 H_(Z)`, While both of them move towards a stationary siran of frequency `165 H_(Z)`. Calulate the speed of the motorcyclist, if he does not observer any beats. (velocity of sound in air `= 330 m//s)`

A

`33 m//s`

B

`22 m//s`

C

zero

D

`11 m//s`

Text Solution

Verified by Experts

The correct Answer is:
B
:. `f_(2) = f_(2)`
:. `176 ((330 - nu)/(330 - 22)) = 165 ((330 + nu)/(330))`
Solving this equation we get,
`nu = 22 m//s`
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