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If a cube is inscribed inside a sphere...

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Director
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If a cube is inscribed inside a sphere...  [#permalink]

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New post 23 Jun 2013, 06:04
If a cube is inscribed inside a sphere then the diagonal ( longest side) of the cube is equal to the diameter of the sphere?

the formula for diagonal of a cube is D = \(\sqrt{3}\)a

Is this correct? Can I apply this strategy for such questions?

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This discussion does not meet community quality standards. It has been retired.


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Re: If a cube is inscribed inside a sphere...  [#permalink]

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New post 23 Jun 2013, 06:11
fozzzy wrote:
If a cube is inscribed inside a sphere then the diagonal (longest side) of the cube is equal to the diameter of the sphere?

the formula for diagonal of a cube is D = \(\sqrt{3}\)a

Is this correct? Can I apply this strategy for such questions?


Don't understand what you mean by the red parts: longest side in a cube? Also what do you mean by "such questions"?

Other than that all is correct.
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Director
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Joined: 29 Nov 2012
Posts: 732
Re: If a cube is inscribed inside a sphere...  [#permalink]

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New post 23 Jun 2013, 06:19
I was referring to the diagonal of the cube as the longest side...

An example of this question would be cube is inscribed inside in a sphere. Volume of sphere is provided and we have to find the surface area of the cube?


Bunuel wrote:
fozzzy wrote:
If a cube is inscribed inside a sphere then the diagonal (longest side) of the cube is equal to the diameter of the sphere?

the formula for diagonal of a cube is D = \(\sqrt{3}\)a

Is this correct? Can I apply this strategy for such questions?


Don't understand what you mean by the red parts: longest side in a cube? Also what do you mean by "such questions"?

Other than that all is correct.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 55709
Re: If a cube is inscribed inside a sphere...  [#permalink]

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New post 23 Jun 2013, 06:27
fozzzy wrote:
I was referring to the diagonal of the cube as the longest side...

An example of this question would be cube is inscribed inside in a sphere. Volume of sphere is provided and we have to find the surface area of the cube?


Bunuel wrote:
fozzzy wrote:
If a cube is inscribed inside a sphere then the diagonal (longest side) of the cube is equal to the diameter of the sphere?

the formula for diagonal of a cube is D = \(\sqrt{3}\)a

Is this correct? Can I apply this strategy for such questions?


Don't understand what you mean by the red parts: longest side in a cube? Also what do you mean by "such questions"?

Other than that all is correct.


An edge (side) of a cube is not the same as diagonal.

Questions to practice:
http://gmatclub.com/forum/a-sphere-is-i ... 27461.html
http://gmatclub.com/forum/a-rectangular ... 28483.html
http://gmatclub.com/forum/for-the-cube- ... 13841.html
http://gmatclub.com/forum/a-rectangular ... 44733.html
http://gmatclub.com/forum/if-the-box-sh ... 27463.html
http://gmatclub.com/forum/what-is-the-v ... 03680.html

Hope it helps.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: If a cube is inscribed inside a sphere...   [#permalink] 23 Jun 2013, 06:27
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