Question

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A right rectangular prism has a length of 15 millimeters, width of 3 millimeters, and height of 4 millimeters.

What is the surface area of the prism?

Answer 1

Surface area of the rectangular prism = 234 mm²

Explanation:

Length of a right rectangular prism = 15 mm

Width of the rectangular prism = 3 mm

Height of the rectangular prism = 4 mm

Surface area of the rectangular prism = 2(lb + bh + hl)

Here, l = length of the prism

b = Width of the prism

h = Height of the prism

By substituting values in the given formula,

Surface area = 2(15×3 + 3×4 + 15×4)

= 2(45 + 12 + 60)

= 2(117)

= 234 mm²