Help m eplzzz Share with your friends Share 0 Siddharth Shankar Singh answered this Solution: Thermal resistance , Thermal resistance, R= 1k×LAHere, k=thermal conductivity, L= lenght or thickness, A=areaAccording to question, area (A) is constant,so, R∝LkFor, product I:Lk=412=13=0.33For, product II:Lk=66=1For, product III:Lk=24=0.5So, RII>RIII>R1Hence, the product (II) will be the best thermal insulator. 0 View Full Answer