Resistance of a metal wire of length 1m is 26 ohm at 20 degree centigrade. If the diameter is 0.3 mm, what is the resistivity?

pls answer......thanks!!!

Dear Student

 
We shall work on this problem using the formula that relates resistance (R), resistivity (ρ), length (l) and cross-sectional area (A) of the conductor.
 
The relation is,

We are given,

 

Hope this solution makes you understand how to solve problems of this kind.
 
Do write back if you have any doubt or confusion in any of the steps.
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