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An underwater sonar source operating at ...

An underwater sonar source operating at a frequency of 60 kHz directs its beam towards the surface. If velocity of sound in air is 330 m/s, wavelength and frequency of the waves in air are :-

A

5.5 mm, 60 kHz

B

330 m, 60 kHz

C

5.5 mm, 30 kHz

D

5.5 mm, 80 kHz

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