A motor car blowing a horn of frequency $$124$$ $$vib/$$$$sec$$ moves with a velocity $$72$$ $$km/hr$$ towards a tall wall. The frequency of the reflected sound heard by the driver will be (velocity$$ of sound in air is $$330$$ $$m/s)

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Infinity Learn · Accepted Answer

Similar to previous question The frequency of reflected sound heard by the driver n'$$=n$$ v−$$($$−$$v0)v$$−$$vs=n$$ $$v+v0v$$−$$vs=124$$ $$330+(72$$×$$5/18)330$$−$$(72$$×$$5/18)=140$$ $$vibration/$$$$sec$$

A motor car blowing a horn of frequency 124 vib/sec moves with a velocity 72 km/hr towards a tall wall. The frequency of the reflected sound heard by the driver will be (velocity of sound in air is 330 m/s)

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