A weight of 100N is suspended by two wires made by steel and copper as shown in figure length of steel wire is 1m and copper wire is $\sqrt{3}m$. Find ratio of change in length of copper wire $\left(\Delta l_c\right)$ to change in length of steel wire $\left(\Delta l_s\right)$. given Young's modulus $Y_{\text{Steel}}=2\times {10}^{11}N/m^2,Y_{\text{Copper}}=1\times {10}^{11}N/m^2$

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