AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

A police car moving at 22 ms−1 chases a motor cyclist. The police man sounds horn at 176 Hz. while both of them move towards a stationary siren of frequency 165 Hz. If the number of beats heard by the motor cyclist per second is zero, then the speed of motorcycle is
(speed of sound in air = 330 ms−1)