Atruncated solid cone is of circular cross section, and its diameter is related to the axial coordinate by an expression of the form d=ax3/2 , where a= 1.0 m-1/2. the sides are well insulated, while the top surface of the cone at x1 is maintained at t1 and the bottom surface at x2 is maintained at t2 . what is the rate of heat transfer across the cone if it is constructed of pure aluminum with x1= 0.075 m, t1= 135°c, x2= 0.225 m, and t2= 20°c? evaluate the properties of aluminum at t¯= 333 k