What is the Fundamental Frequency in Question 6?

[McKeavey]

Homework Statement

Shown in Picture attachment
Question number 6

Homework Equations

Not sure..I'm fresh on physics at the moment.. :(

The Attempt at a Solution

Givens
T1 = 250N
T2 = 160N
L1 = 45cm
L2 = 56cm
f1 = 450Hz
f2 = ?

I'm pretty clueless at the moment.. :(

 

[diazona]

Here's a hint to get you started: check your references (textbook, notes, whatever you are working from) for an equation that involves tension and linear mass density.