1. The problem statement, all variables and given/known data A medium carbon annealed steel rod has a rectangular cross section and must cope with a tension of 3 tonnes. The thickness of the rod is 15mm. Calculate the size of the cross section. 2. Relevant equations ???? The only formula I know with CSA and force is: stress = Force / Area ???? 3. The attempt at a solution I've not yet worked out a way to even attempt an answer... I know the load is 29430N (3000 x 9.81) but I'm not sure how to evolve this into useful data!? Can this be solved with this level of info??