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Two open organ pipes of fundamental freq...

Two open organ pipes of fundamental frequencies `n_(1) and n_(2)` are joined in series. The fundamental frequency of the new pipe so obtained will be

A

`(n_(1) + n_(2))`

B

`(n_(1) + n_(2))/(2)`

C

`sqrt(n_(1)^(2) + n_(2)^(2))`

D

`(n_(1)n_(2))/(n_(1) + n_(2))`

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