Question

7. The two nearest harmonics of a tube closed at one
end and open at other end are 220 Hz and 260 Hz.
What is the fundamental frequency of the system?
(a) 10 Hz (b) 20 Hz (c) 30 Hz (d) 40 Hz
11
.hoofnenberical obiect is B. If it is​

Answer 1

Answer:

I think answer is

Option b) 20 hz

Answer 2

Answer:

B 20 hz

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