3-151 Consider two tubes of the same diameter (D = 20 cm), reigth, and surface temperature (T1). One tube is properly cen- tered in a cylindrical insulation of D,40 cm; the other tube is tric with the same diameter cylindrical insulation, e distance between the center of the tube and the center s z = 5 mm. If both configurations have the placed in eccentric w of the insulation z e outer surface temperature Ta, determine w es ratu s the higher rate of heat transfer through the insulation.