The fundamental frequency of a closed organ pipe is f. If both the ends are opened then its fundamental frequency will be?

The fundamental frequency of a closed organ pipe is f. If both the ends are opened then its fundamental frequency will be?

Explanation

In a closed organ pipe, the fundamental frequency is f = v / 4L.  

If both ends are opened, it behaves like an open pipe, and the fundamental frequency becomes f' = v / 2L.

So, f' = 2f.