Given data
*The given length is L = 1.1 m
*The given width is w = 0.8 m
*The given height is h = 1.3 m
The formula for the surface area of the rectangular prism is given as
[tex]S=2(lw+lh+wh)[/tex]
Substitute the values in the above expression as
[tex]\begin{gathered} S=2(1.1\times0.8+1.1\times1.3+0.8\times1.3) \\ =2(0.88+1.43+1.04) \\ =6.7^{}\text{ sq meter} \end{gathered}[/tex]
Thus, the reflective material should be 6.7 square meter
