(Solved): The cross-section shown below is subject to a positive internal bending moment M=180kNm applied abo ...

The cross-section shown below is subject to a positive internal bending moment $M=180\mathrm{kNm}$ applied about the local zaxis of the section. The top flange has a width $b=200\mathrm{mm}$ and a thickness $a=12\mathrm{mm}$, the web has a thickness $t=10\mathrm{mm}$, and the total section has a height $h=250\mathrm{mm}$. In your working express your centroidal location to the nearest tenth of a millimetre and express the second moment of area for the cross-section to the nearest millimetre. Determine the maximum tensile normal stress in the cross-section due to the internal moment. Report your answer in units of MPa with one decimal place of accuracy. Determine the maximum compressive normal stress in the cross-section due to the internal moment. Report your answer in units of MPa with one decimal place of accuracy.