\(\therefore \,\frac{{{R_1}}}{{{R_2}}} = \,\frac{{{L_1}}}{{{k_1}{A_1}}} \times \frac{{{k_2}{A_2}}}{{{L_2}}}\, = \,\frac{1}{2} \times \frac{2}{1} \times \frac{1}{2}\,\,\,\,\therefore \,\,\,\,\frac{{{R_1}}}{{{R_2}}}\,\,\, = \,\,\,\frac{1}{2}\)
(આપેલ : બરફની ગલનગુપ્ત ઉષ્મા $=3.36 \times 10^5\; J kg ^{-1}$)