JEE Main 201910 Apr, Morning shiftPhysicsEasyOscillations and Waves185× since 2002
A stationary source emits sound waves of
frequency 500 Hz. Two observers moving
along a line passing through the source detect
sound to be of frequencies 480 Hz and 530 Hz.
Their respective speeds are, in ms–1,
(Given speed of sound = 300 m/s)