A source of frequency $150 Hz$ is moving in the direction of a person with a velocity of $110\, m/s$. The frequency heard by the person will be .... $Hz$ (speed of sound in medium $= 330 m/s$)
Medium
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(a) $n' = \frac{v}{{v - {v_s}}} \times n = \left( {\frac{{330}}{{330 - 110}}} \right) \times 150 = 225\,Hz$
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