What length of the wire of specific resistance $48×{10}^{-8}\text{\hspace{0.17em}}\Omega \text{\hspace{0.17em}\hspace{0.17em}}m$is needed to make a resistance of 4.2 Ω (diameter of wire = 0.4 mm

(1) 4.1 m

(2) 3.1 m

(3) 2.1 m

(4) 1.1 m