The resistance of a wire is 'R' ohm. If it is melted

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length, its new resistance will be :-

We know that, R =	ρl
	A

or R =	ρl²	⇒ R ∝ l²
	Volume

According to question l₂ = nl₁

	R₂	=	n²l₁²
	R₁		l₁²

or,	R₂	n²
	R₁

⇒ R₂ = n²R₁