JEE Main 201912 Apr, Evening shiftPhysicsMediumOscillations and Waves185× since 2002
Two sources of sound S₁ and S₂ produce sound waves of same frequency 660 Hz. A listener is moving from
source S₁ towards S₂ with a constant speed u m/s and he hears 10 beats/s. The velocity of sound is 330 m/s.
Then, u equals :