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two speakers A and B , placed 1 m apart,...

two speakers A and B , placed 1 m apart, each produces sound waves of frequnecy 1800 Hz. In phase. A detector moving parallel to line of speakers distant 2.4 m away detects a maximum intensity at O nd then at P. speed of sound wave is

A

`330 ms^(-1)`

B

`360 ms^(-1)`

C

`350 ms^(-1)`

D

`340 ms^(-1)`

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The correct Answer is:
B
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