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In the figure above, X and Y are the centers of two opposite faces of

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In the figure above, X and Y are the centers of two opposite faces of  [#permalink]

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New post 13 Mar 2018, 07:20
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A
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D
E

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In the figure above, X and Y are the centers of two opposite faces of the cube. What is the length of XY?

(1) The volume of the cube is 27 cubic meters
(2) The surface area of the cube is 54 square meters

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Re: In the figure above, X and Y are the centers of two opposite faces of  [#permalink]

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New post 13 Mar 2018, 07:21
Bunuel wrote:
In the figure above, X and Y are the centers of two opposite faces of the cube. What is the length of XY?

(1) The volume of the cube is 27 cubic meters
(2) The surface area of the cube is 54 square meters



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Re: In the figure above, X and Y are the centers of two opposite faces of  [#permalink]

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New post 13 Mar 2018, 07:55
In the figure, X and Y are the centers of two opposite faces of the cube.
So XY will be equal to side , let assume it to be ''a''.
Statement 1: Volume is given , Volume of cube = cube of a , so we can findout the value of a
Statement 2 : Surface area is given , surface area of cube = 6 * square of a , from this also we can find out the a
From both statement individually, we can find a (XY).
So Answer would be D
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Re: In the figure above, X and Y are the centers of two opposite faces of  [#permalink]

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New post 13 Mar 2018, 08:09
The Question asks for the distance between the center of opposite sides which is equal to side.
1) Volume is fixed, hence side is fixed.
Sufficient.
2) Surface area is fixed, Side is fixed
Sufficient.

Answer D
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Re: In the figure above, X and Y are the centers of two opposite faces of &nbs [#permalink] 13 Mar 2018, 08:09
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