In an open organ pipe v 3 and v 6 are 3 rd and 6 th harmonic frequencies, respectively. If v 3 – v 6 = 2200 Hz then leng…

In an open organ pipe v₃ and v₆ are 3^rd and 6^th harmonic frequencies, respectively. If v₃ – v₆ = 2200 Hz then length of the pipe is_______mm.

(Take velocity of sound in air is 330 m/s.)