1.

An open pipe is suddenly closed at one end with the result that the frequency of third harmonic of the closed pipe is found to be higher by `100 Hz` then the fundamental frequency of the open pipe. The fundamental frequency of the open pipe isA. `100 Hz`B. `300 Hz`C. `150 hz`D. `200 Hz`

Answer» Correct Answer - D
`5xx(v)/(4l)-(v)/(l)=100` or `(v)/(l)((5)/(4)-1)=100`
or `(v)/(4l)=100` or `(v)/(2l)=200` or `v=200Hz`


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