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How much cardboard will it take to make an open cubical box with no to

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How much cardboard will it take to make an open cubical box with no to [#permalink]

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New post 29 Oct 2017, 00:51
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Question Stats:

79% (00:38) correct 21% (00:56) wrong based on 63 sessions

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How much cardboard will it take to make an open cubical box with no top?

(1) The area of the bottom of the box is 4 square feet.
(2) The volume of the box is 8 cubic feet
[Reveal] Spoiler: OA

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Re: How much cardboard will it take to make an open cubical box with no to [#permalink]

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New post 30 Oct 2017, 11:13
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(1)The area of the bottom of the box is 4 square feet.

Cube is a 3D object with six squares. Therefore area of the bottom of the box which is a square = 4 Hence each side a=2

Since we know the length of each side we can get the length of the cardboard to make open cubical box with no top.

Sufficient

(2)The volume of the box is 8 cubic feet

Volume of cube is a^3=8
Therefore a=2
Same as (1)
Sufficient

Hence answer is D.
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Re: How much cardboard will it take to make an open cubical box with no to [#permalink]

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New post 02 Nov 2017, 08:33
Rephrase - What is the area of cubical box without considering area of its top.

Cube is structure where are sides are same.
Area of cube = 6*(side)^2
Volume = (Side)^3

Option 1: Area of bottom of cube is 4 - As itsa cube, the base would be square. hence size of side =2, this is sufficient
Option 2: Volume of Cube is given which is sufficient to find the area of cardboard required.

Answer D

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Re: How much cardboard will it take to make an open cubical box with no to [#permalink]

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New post 03 Nov 2017, 04:55
Bunuel wrote:
How much cardboard will it take to make an open cubical box with no top?

(1) The area of the bottom of the box is 4 square feet.
(2) The volume of the box is 8 cubic feet

I think "how much cardboard" is not clear enough. Are we talking about the area? Does thickness of the walls not matter here? So amount of cardboard required may actually depend on properties of cardboard. I would go with E

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Re: How much cardboard will it take to make an open cubical box with no to   [#permalink] 03 Nov 2017, 04:55
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