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Air is blown at the mouth of an open tub...

Air is blown at the mouth of an open tube of lenghts 25 cm and diameter 2 cm. If the velocity of sound in air is `330 ms^(-1)`, then emitted frequencies are (in Hz)

A

`660,1320,2640`

B

`660,1000,3300`

C

`302,664,1320`

D

`330,990,1690`

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The correct Answer is:
A
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