Two rectangular blocks having... |JEE Advanced 2013| Thermal

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Two rectangular blocks, having indentical dimensions, can be arranged either in configuration I or in configuration II as shown in the figure, On of the blocks has thermal conductivity k and the other 2 k . The temperature difference between the ends along the $x$-axis is the same in both the configurations. It takes 9 s to transport a certain amount of heat from the hot end to the cold end in the configuration I. The time to transport the same amount of heat in the configuration II is :

Select the correct option:

A

2.0 s

B

3.0 s

C

4.5 s

D

6.0 s

✓ Correct! Well done.

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