A Plane Truss with Span Length L = 4 $4500 \mathrm{~mm}^{2}$

A plane truss with span length L = 4.5 m is constructed using cast iron pipes (E = 170 GPa) with a cross-sectional area of 4500 mm $4500 \mathrm{~mm}^{2}$ . The
Displacement of joint B cannot exceed 2.7 mm. The maximum value of
Loads P is approximately: (A) $340 \mathrm{kN}$
(B) $460 \mathrm{kN}$
(C) $510 \mathrm{kN}$
(D) $600 \mathrm{kN}$