Three straight metal wires, AC, BC and CD, having same length, diameter and thermal conductivity are connected as shown in the figure. Heat flows from points 'A' and 'B' to point 'C' and from point 'C' to 'D'. Temperatures at points A, B and D are 100°C, 100°C and 40°C, respectively. Assuming steady-state condition and no heat loss from the wires, the temperature at point 'C' is ______ °C. (Answer in integer)