Question

the two nearest harmonics of a tube closed at one end and opened at the other end are 240Hz and 280Hz.What is the fundamental frequency of the system​

Answer 1

f(1) = v/2L, so fundamental frequency of the system = 343 m/s/2(7/3)L = 343 m/s*(7/6)L.

The fundamental frequency can be computed as 204.25 Hz.

343 m/s is the speed of sound BTW.