Resistance of a wire of length 1 m is 35 Ω at 20° C. If the diameter of the wire is 0.2 mm, determine the res…

Resistance of a wire of length $1$ m is $35\Omega$ at $20^{\circ }$C. If the diameter of the wire is $0.2$ mm, determine the resistivity of the material of the wire at that temperature. How will the resistivity of the wire change if the length and diameter of the wire both are doubled ? Justify your answer. (Given that $\pi =\frac{22}{7}$)