Consider the deformable pin-jointed truss with loading, geometry and section properties as shown in the figure

Q. Consider the deformable pin-jointed truss with loading, geometry and section properties as shown in the figure.

Given that E = 2×10¹¹ N/m², A = 10 mm², L = 1 m and P = 1 kN. The horizontal displacement of Joint C (in mm, up to one decimal place) is                                        

Ans: 2.60-2.80