Current Attempt in Progress

Organ pipe $A,$ with both ends open, has a fundamental frequency of $290$ Hz $.$ The third harmonic of organ pipe $B,$ with one end open, has the same frequency as the second harmonic of pipe $A.$ How long are $($a$)$ pipe A and $($b$)$ pipe $B?($Take the speed of sound to be $343\frac{m}{s}.)$

$($a$)$ Number

Units

$($b$)$ Number

Units