Two wires of diameter $0.25 cm$, one made of steel and the other made of brass are loaded as shown in Fig. The unloaded length of steel wire is $1.5 m$ and that of brass wire is $1.0 m$. Young's modulus of steel is $2.0 x {10}^{11}Pa$ and that of brass is $0.91 x {10}^{11}Pa$. The elongations of brass wire is $\mathrm{n} \mathrm{x} {10}^{-4}\mathrm{m}$. The value of n is ($1 Pa=1 N{m}^{-2}$)