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A motor car blowing a horn of frequency ...

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

A

109 vib/s

B

132 vib/s

C

140 vib/s

D

248 vib/s

Text Solution

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The correct Answer is:
B
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