A 10 cm long and 5 cm diameter steel rod fits snugly between two rigid walls 10cm apart at room temperature. Young’s modulus of elasticity and coefficient of linear expansion of steel are $2\times10^{6} \frac{kgf}{cm^{2}}$, $12\times 10^{-6}/_{}^{0}\textrm{C}$ respectively. The stress developed in the rod due to a $100^{0}$ rise in temperature will be
