1. The problem statement, all variables and given/known data A stationary whistle emits a sound of 190 Hz. If a car hears the whistle with a frequency of 198 Hz, how fast was it moving (in m/s)? Use 340 m/s for the sound velocity 2. Relevant equations f'=(1+Vo/V)f ======>>>> equation for the observer moving toward stationary source. 3. The attempt at a solution f'=(1+Vo/V)f 198=(1+Vo/340)190 please help! what am i doing wrong?