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[" 175.The driver of a car travelling wi...

[" 175.The driver of a car travelling with speed "30ms^(-1)" ,"],[" towards a hill sounds a horn of frequency "600Hz" ."],[" If the velocity of sound in air is "330ms^(-1)" ,"],[" the frequency of reflected sound as heard by "],[" driver is "],[[" (a) "550Hz," (b) "555.5Hz],[" (c) "720Hz," (d) "500Hz]]

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