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The sources S(1) is at rest. The observe...

The sources `S_(1)` is at rest. The observer and the source `S_(2)` are moving towards `S_(1)` as shown in figure. The roof beats observed by the observer if both sources have frequency 120 Hz and speed of sound 330m/s in is

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The correct Answer is:
8.12 or 8.13
Speed of sound =330 m/s
Calculated beat `f_(req)`

`f_(b)=120[((330+10 cos 53^(2))/(330-30 cos 37^(@)))-((330+10)/330)]=120[336/306-34/33]=8.128 Hz`
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