$\frac{0}{12\mathrm{.}5}$ points

The truss shown below is pinned at one end and has a roller at the other end. The truss is subjected to the forces, P and $2$ P $,$ where $P=38kN.$ Compute the horizontal displacement at D $.$ Take $E=205$GPa and $A=50\mathrm{.}0c{m}^2.$ Give your answer to $2$ decimal places in mm $.$ Assume that the node will displace to the left.

$148\mathrm{.}8$

Correct Answer: $-1\mathrm{.}44$