A 50KN force is applied on a table,the length of four legs of table is 2m each and of radius 5cm.If young modulus of material of table is $5\times 10^{10}N/m^2$.Find the decrease in length in a leg of table.

Question

$\begin{array}{1 1}(A)\;1mm\\(B)\;2mm\\(C)\;3mm\\(D)\;4mm\end{array}$