Question

The ratio of the coefficients of thermal conductivities of two different materials is 4:5. To
have the same thermal resistance of the two rods of these materials of equal thickness,
what should be the ratio of their lengths?

Answer 1

$\huge \tt \red{question}$

The ratio of the coefficient of thermal conductivity of two different materials is 5:3. If the thermal resistance of the rod of the same thickness resistance of the rods of the same thickness of these materials is same, then the ratio of the length of these rods will be?

$\huge \tt \red{answer}$

5 : 3 is your answer.

Explaination in the picture ☺️