Posted by jason on Thursday, February 9, 2012 at 1:43pm.
p1^L1/D1^2 = p2*L2/D2^2 since resistances are equal.
(The p's are the resistivities, which you need to look up). Since L1 = L2,
D1/D2 = sqrt(p2/p1)
subscript "1" denotes silver and subscript "2" denotes platinum.
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