The difference between the apparent frequency of a sound of soun as perceived by an observer during its approach and recession i

The difference between the apparent frequency of a sound of soun as perceived by an observer during its approach and recession is `2%` of the natural frequency of the source. If the velocity of sound in air is `300m//s`, the velocity of the source is (It is given that velocity of source `ltlt velocity of sound )
A. `6 m//sec`
B. `3 m//sec`
C. `1.5 m//sec`
D. `12m//sec`

The difference between the apparent frequency of a sound of soun as perceived by an observer during its approach and recession is `2%` of the natural

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