Question

Surface area length 9 depth 4 width 5

Answer 1

202

Explanation:

SA=2(wl+hl+hw)

SA=2(5x9+4x9+4x5)

SA=2(49+36+20)

SA= 98+72+40

SA= 210 square centimeters

Answer 2

to find surface area, we have to find the area of each surface of the shape.

to find the side’s area, multiply length x width (9 x 4). the side rectangle = 36 cm^2

to find the back side’s area, multiply 4 x 5 = 20 cm^2

now, just multiply each of those based on how many times each appear in the figure

there are 4 rectangles congruent to the front one - so 4 x 36 cm^2 = 144 cm ^2

there are 2 rectangles congruent to the back one - so 2 x 20 cm^2 = 40 cm^2

now that we have the area of all the surfaces, simply add them together: 40 cm^2 + 144 cm^2 = 184 cm^2

SA = 184 cm^2