Solve this. Q. A thin aluminium plate has a surface area of 1,500 m 2 at 20 ° C. What will be its surface area when it is cooled to - 20 ° C? (Take the linear expansivity of aluminium to be 2 . 5 × 10 - 5 K - 1 ) Share with your friends Share 0 Shobhit Mittal answered this Dear Student, A0=1500 m2 A=A01+β-40=15001-2.5*10-5*40=1500-1.5=1498.5 m2Regards 0 View Full Answer