Calculating Resistivity and Resistance: Solving for Unknowns

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Jaymo3141
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Homework Statement





Homework Equations


R=pL/A


The Attempt at a Solution



The answer is C and I don't know why. If R = pL/A then isn't L=b between X and Y?
 
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  • Diagram of an equilateral triangle with vertices X and Y at the bottom, each side labelled b, followed by the problem text and five multiple-choice answers (A) to (E) as fractions involving rho, b and A.
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There are 2 wires running from X to Y. These wires are in parallel. One is of length 2b, and the other is of length b. You need to find the overall resistance of these two resistors in parallel.

I don't think that this problem is stated very well. I think it should state outright that there are two resistances in parallel.