Physics
posted by AfterLife .
The fundamental of an organ pipe that is closed at one end and open at the other end is 261.6 Hz ( middle C ). The second harmonic of an organ pipe that is open at both ends has the same frequency. What are the lengths of the pipe?
I tried solving it and I got 0.65 and 0.98 and they are wrong .. how can I solve it :S

What speed of sound are you assuming?

Solved it thank you