Answer:
0.50027[tex]m^{2}[/tex]
Explanation:
ΔA=[tex]2\alpha A_{0} T[/tex]
Where ΔA is the change in area
There is a 2 since the coefficient for area = 2 x that for the linear coefficient
[tex]A_{0}[/tex] is the original area
[tex]\alpha[/tex] is the coefficient of thermal expansion
And T is the change in temperature
ΔA=2(0.000009)(0.5)(30-0)=0.00027[tex]m^{2}[/tex]
New area= ΔA+[tex]A_{0}[/tex] = 0.5+0.00027=0.50027[tex]m^{2}[/tex]
