A Cylindrical Tube Sustains a Fundamental Frequency F₁ When Both

Multiple Choice

A cylindrical tube sustains a fundamental frequency f₁ when both of its ends are open. A second cylindrical tube with one end closed has the same fundamental frequency. What is the ratio of the length of the second tube to that of the first, L₂/L₁?

A) 0.5
B) 4
C) 2
D) 0.25
E) 1