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The driver of a car travelling with spee...

The driver of a car travelling with speed `30ms^-1` towards a hill sounds a horn of frequency 600 Hz. If the velocity of sound in air is `330ms^-1`, the frequency of reflected sound as heard by driver is

A

`555.5Hz`

B

`720Hz`

C

`500Hz`

D

`550Hz`

Text Solution

Verified by Experts

The correct Answer is:
B

`n._(ref)=n[(V-(-V_(c )))/(V-(+V_(c )))]`
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