1. The problem statement, all variables and given/known data The 1st rensonat length of a closed air column occurs when the length is 30.0cm. what will the send ond and third be? 2. Relevant equations I did the pattern thign like 3/4 but i got the wrong answer. 3. The attempt at a solution i multplied the legth 3/4 but i got the wrong answer.