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Mathematics 8 Online
OpenStudy (anonymous):

Each cube in the object has sides measuring 2.5cm what is the total surface area of the object?

OpenStudy (anonymous):

Directrix (directrix):

@ernesto22 Look at the first question at this link and determine if what is given there makes sense. http://tinyurl.com/p5u5cjm

OpenStudy (anonymous):

@Directrix but the answer doesn't make sense

OpenStudy (anonymous):

@Directrix there are 31 faces, not 26. why did they multiply by 26?

Directrix (directrix):

Those faces on the inside that touch do not count as surface area.

Directrix (directrix):

Let's start at the bottom left cube and count faces. So, for the first cubes, how many faces count as surface area? I have the six cubes numbered so let's start with cube #1 only. @ernesto22

OpenStudy (anonymous):

Ooh well that makes much more sense

OpenStudy (anonymous):

@directrix so it would be 5 faces that count as the surface area

Directrix (directrix):

Attached is my latest count. It seems to change each time I count. Look at each cube individually. The number of square faces in the count varies according to the position of the cube. At least, that is what I am thinking. @ernesto22

Directrix (directrix):

I just counted one more time and the count went up by 1. In red is the number of square faces I counted for each cube.

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