Question

Two Dimensional Nets and Surface Area - Quiz - Level

What is the total surface area of
THREE of these ice cubes?
aft2
30 Ft?
24 ft?
18 ft2

Answer 1

`18\ ft^2`

Explanation:

The complete question in the attached figure

we know that

The surface area of a cube is equal to the area of its 6 squares faces

so

The area of one square face is equal to

`A=b^2`

where

b is the length side of the square

we have

`b=1\ ft`

substitute

`A=(1)^2=1\ ft^2` ---> area of one square face

Find the surface area of three cubes

Multiply the area of one square face by 6 (one cube has 6 faces) and then multiply the result by 3 (3 cubes)

so

`SA=3[6(1)]=18\ ft^2`