1.

A pipe of lengths 10 cm, closed at one edn, has frequency equal to half the `2^(nd)` overtone of another pipe open at the ends. The lengths of the open pipe isA. 10cmB. 20cmC. 35cmD. 30cm

Answer» Correct Answer - D
`(3n_0)/(2) =n therefore n_0 = (2n)/(3)`
`(v)/(2l_0) = 2/3xx(v)/(4l_c)`
`l_0 = 3xx10=30cm`


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