The temperature difference between two ends of a 2 m long bar A is `40^@C` and that between a 3 m long bar B of same area is `60^@C` . If the rate of conduction of heat in two bars is same, calculate the ratio of coefficients of thermal conductivity of two bars.

Explanation

To solve the problem, we need to use the formula for the rate of heat conduction through a material, which is given by Fourier's law of heat conduction:

\[ Q = \frac{k \cdot A \cdot \Delta T}{L} \]

Where:
- \( Q \) = rate of heat transfer
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