A police car moving at $30 \mathrm{m} {\mathrm{s}}^{-1}$, chases a motorcyclist. The policeman sounds his horn at $180 \mathrm{Hz}$, while both of them move towards a stationary siren of frequency $160 \mathrm{Hz}$. If it is given that the motorcyclist does not observe any beats then, calculate the speed (in $\mathrm{m} {\mathrm{s}}^{-1}$) of the motorcyclist round off to two decimal places? [speed of sound $=330 \mathrm{m} {\mathrm{s}}^{-1}$]