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 H`z. Calculate the speed of the motorcycle, if it is given that he does not observes any beat

Options

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

Answer

C

Explanation

`n_1=n_2implies(v-v_m)/(v-v_C)n'=(v+v_m)/(v)n`
`implies(v-v_m)/(v-22)xx176=(v+v_m)/(v)xx165`
`impliesn_m=22(m)/(s)`