Consider steady two-dimensional heat transfer in two long solid bars whose cross sections are given in the figure. The measured temperatures at selected points on the outer surfaces are as shown. The thermal conductivity of the body is k = 20 W/m · K, and there is no heat generation. Using the finite difference method with a mesh size of Δx = Δy = 1.0 cm, determine the temperatures at the indicated points in the medium.

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300 250 Insulation 200 50 150 1 cm (4) 1 50 1 cm 1 cm x "1 c 2 100°C cm (2) 1 Insulation (a) 50 150 (3) 200 50 50°C (3) 4) 150 150 150 150 (b) 250 Insulation 150°C 300