$A$ closed organ pipe and an open organ pipe have their first overtones identical in frequency. Their lengths are in the ratio

In an open organ pipe,if the fundamental frequency is $n$,then the other frequencies are:

$A$ closed organ pipe (closed at one end) is excited to support the third overtone. It is found that air in the pipe has

$A$ closed organ pipe and an open organ pipe have their first overtones identical in frequency. Their lengths are in the ratio:

The fundamental frequency of a pipe is $100 \ Hz$ and the next two frequencies are $300 \ Hz$ and $500 \ Hz$. Then:

In a closed organ pipe,the frequency of the fundamental note is $30 \,Hz$. $A$ certain amount of water is now poured into the organ pipe so that the fundamental frequency increases to $110 \,Hz$. If the organ pipe has a cross-sectional area of $2 \,cm^2$,the amount of water poured into the organ tube is . . . . . . $g$. (Take the speed of sound in air as $330 \,m/s$)