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Mathematics 18 Online
OpenStudy (anonymous):

@marissalovescats I have noticed you're online. could you please help me with something, i am confused.

OpenStudy (anonymous):

OpenStudy (anonymous):

I'm confused on how to do this. I have divided 144 by 3 and it gave me 48 and that's wrong.

OpenStudy (marissalovescats):

Probably because the dimensions are 3 times and not the overall surface area. If it's not B it has to be A because that's the only number smaller than 144.

OpenStudy (anonymous):

but how did you do it?

OpenStudy (marissalovescats):

I honestly have no idea haha

OpenStudy (anonymous):

This got me to 432. And I'm confused how.

OpenStudy (marissalovescats):

Well in that one, you had to read it carefully. It's asking for the Surface area of Box B which is bigger than A so it can't be 27 because 27<54

OpenStudy (anonymous):

I chose randomly haha. but I don't understand why it isn't something less than 432? You don't know about this topic ?

OpenStudy (marissalovescats):

I have an idea

OpenStudy (anonymous):

Thanks anyway c:

OpenStudy (marissalovescats):

I do know that if we can find the dimensions of cube A then we can find the volume of cube B. Let me do some research real quick

OpenStudy (anonymous):

Okay c:

OpenStudy (marissalovescats):

OKAY GOT IT

OpenStudy (anonymous):

The volume of cube B is 216. A cube has all the sides equal and to get the volume, you multiply length * width * height. If the volume is 27, so it is 3 * 3 * 3 to get 27. If the dimensions are twice of A, then it will be 6 * 6 * 6 to get 216. <- I FOUND THIS!!

OpenStudy (marissalovescats):

So it says that the DIMENSIONS of Cube B (aka sides of a cube aka all the same length bc its a cube) are twice the dimensions of Cube A. We know the volume of Cube A is 54 We know the volume of a cube is V=a^3 So we solve for a to find a dimension of Cube A: |dw:1402017402726:dw|

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