A thin aluminium plate has a surface area of $ 1.500 \mathrm{~m}^{2} $ at $ 20C^\circ $. What will be its surface area when it is cooled to $ -20C^\circ $? (Take the linear expansivity of aluminium to be $ 2.5 \times 10^{-5} \mathrm{~K}^{-1} $).

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$ 1.497 \mathrm{~m}^{2} \quad $

Utme 2025 Physics Question 11

A thin aluminium plate has a surface area of \( 1.500 \mathrm{~m}^{2} \) at \( 20C^\circ \). What will be its surface area when it is cooled to \( -20C^\circ \)? (Take the linear expansivity of aluminium to be \( 2.5 \times 10^{-5} \mathrm{~K}^{-1} \)).

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