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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Oscillations
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Find the frequency heard by the observer if velocity of observer = 15 m/s, velocity of source = 20 m/s, frequency of sound source = 400 Hz and velocity of sound waves = 340 Hz

$(a)\;418\;Hz\qquad(b)\;408\;Hz\qquad(c)\;438\;Hz\qquad(d)\;428\;Hz$

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