Question

What is the surface area of a rectangular prism with length 12 mm, width 3mm and height 5 mm

Answer 1

The surface area of the rectangular prism is of 22 square millimeters.

Explanation:

Surface area of rectangular prism:

The surface area of a rectangular prism with length l, width w and height h is given by:

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

Length 12 mm, width 3mm and height 5 mm

This means that
`l = 12, w = 3, h = 5`

Surface area:

`S = 2(lw + lh + wh) = 2(12(3) + 12(5) + 3(5)) = 2(36 + 60 + 15) = 2(111) = 222`

The surface area of the rectangular prism is of 22 square millimeters.