How would you solve this?

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Consider a wall of a house with thickness L, thermal conductivity k and surface area A, when the temperature difference across the wall is A7. In such conditions, the conduction heat transfer rate through the wall is 옮 Imagine the wall is replaced by another wall of the same surface area A, same thickness L. but made of a different material with an unknown thermal conductivity. The heat transfer is then measured at a different time of day when the temperature difference is now 3 so that If the rate of heat transfer through the new wall is halved as compared to the rate of heat transfer through the original wall (Q)neu u. (외 what is the unknown thermal conductivity relative to the original k?