Question

Help right answer, please
Calculate the surface area of the following figure.

Answer 1

158 in²

Explanation:

surface area = area of 4 sides + area of base + area of top

= (8 X 5) + (3 X 5) + (8 X 5) + (3 X 5) + (8 X 3) + (8 X 3)

= 40 + 15 + 40 + 15 + 24 + 24

= 158 in²

Answer 2

Answer: 158 in²

Explanation:

We can use the given formula for a rectangular prism's surface area to help us solve. The surface area is the combined total of all the face's areas.

This formula finds the area of each pair of congruent faces (a rectangular prism has 3 sets of congruent sides) and adds them together for us.

A = 2(wl + hl + hw)

A = 2((3 in)(8 in) + (5 in)(8 in) + (5 in)(3 in))

A = 2(24 in² + 40 in² + 15 in²)

A = 2(79 in²)

A = 158 in²