A stainless-steel ruler with length 300 mm, width 25 mm, and thickness 1 mm, initially at 0 C, is put in boiling water. Because of the turbulence in the boiling, you can assume that the outside of the rules reaches 100 C immediately. Estimate the temperature on the inside (i.e., at 0.5 mm from the outside on both sides) after 0.01 s.

Data of steel: cp = 500 J /kg. K

lamda = 20 W/ m. K

density = 7700 kg /m^3