Question

Resistivity of a material is the resistance of a cm long sample of the material of 1 cm2 cross-sectional area.

Answer 1

Yes the formula of resistivity is:

$R=\dfrac{\rho l}{A}$

Where $\rho$ is relativistic resistance with units $\dfrac{\Omega}{m}$, each metal has different relativistic resistance you must find the relativistic resistance of your material using the table of relativistic resistances.

$l$ stands for the length of a wire.

$A$ stands for the area of the wire. Usually it is equal to $\pi r^2$ because.

So now we have data $A=1cm^2$ but nothing else was specified so we are unable to calculate anything.

Hope this helps.

r3t40