Question

How much reflective material is needed to cover the block completely, without any overlaps?

Answer 1

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

`S=2(lw+lh+wh)`

Substitute the values in the above expression as

`\begin{gathered} S=2(1.1*0.8+1.1*1.3+0.8*1.3) \\ =2(0.88+1.43+1.04) \\ =6.7^{}\text{ sq meter} \end{gathered}`

Thus, the reflective material should be 6.7 square meter