Find Numerical Value Of Transverse Modulus

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Homework Statement

Homework Equations

Square Packing: V_f = ∏/4(r/R)^2
E=σ/ε

The Attempt at a Solution

E=10MPa/0.001 = 1x10^4
E_2f=?
V_m=?

I get stuck here, am I on the right track with this problem? I need some guidance, please!

 

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Anyone lend some help? :)