(Solved): 2. A reinforced concrete bridge pylon 0.5m thick and 6m wide is supported by cable stays as sho ...

2. A reinforced concrete bridge pylon $0.5\mathrm{m}$ thick and $6\mathrm{m}$ wide is supported by cable stays as shown in the figure at right, with $w=35\mathrm{m}$ and $h=30\mathrm{m}$. The pylon has only a front and rear stay, and each stay has a tension of $10^7\mathrm{N}$. The modulus of reinforced concrete is $45\mathrm{GPa}$. From the attachment bottom, the pylon is $40\mathrm{m}$ long. By how $\mathrm{n}$ cable tension?