Question

What is the surface area?

Answer 1

Answer: 90 mm²

Explanation:

We will use the given formula for surface area, substitute known values, and simplify by multiplying and adding.

SA = 2(wl + hl + hw)

SA = 2((2 mm)(5 mm) + (5 mm)(5 mm) + (5 mm)(2 mm))

SA = 2(10 mm² + 25 mm² + 10 mm²)

SA = 2(45 mm²)

SA = 90 mm²