The diagram shows a cuboid.
8 cm
15 cm
20 cm
What is the surface area of the cuboid?

1160 cm^2

Step-by-step explanation:

Surface area=2(lw)+2(hl)+2(hw)

So, surface area=2(15x20)+2(8x15)+2(8x20)

=2(300)+2(120)+2(160)

=600+240+320

surface area=1160 cm^2.

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2