A police car moving at 22m/s chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle. If it is given that the motorcyclist does not observe any beats:

Options

A. `33m//s`
B. `22m//s`
C. zero
D. `11m//s`

Answer

A

Explanation

As no beats `f_(1)=f_(2)`
`176((330-v_(0))/(330-22))=165((330+v_(0))/(330))`
`v_(0)=22m//sec`