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The figure above shows the dimensions of a rectangular box

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The figure above shows the dimensions of a rectangular box [#permalink]

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New post 06 Mar 2008, 12:30
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The figure above shows the dimensions of a rectangular box that is to be completely wrapped with paper. If a single sheet of paper is to be used without patching, then the dimensions of the paper could be
(A) 17 in by 25 in
(B) 21 in by 24 in
(C) 24 in by 12 in
(D) 24 in by 14 in
(E) 26 in by 14 in
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Re: PS:Rectangular [#permalink]

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New post 06 Mar 2008, 13:57
Is it B?
Here's my explanation: In order to determine the dimensions of the sheet of paper we have to find out the surface area of the rectanglular box, which is 432. Only B satisfies this condition.
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Re: PS:Rectangular [#permalink]

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New post 06 Mar 2008, 17:13
It's B. Thanks for explanation.
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Re: PS:Rectangular [#permalink]

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New post 06 Mar 2008, 20:35
moni77 wrote:
Is it B?
Here's my explanation: In order to determine the dimensions of the sheet of paper we have to find out the surface area of the rectanglular box, which is 432. Only B satisfies this condition.


Easier method without calculations is view pictorially.
See picture.

To wrap the box we need paper of size (2+8+2+8) by (2+20+2)

i,e 20 by 24
Re: PS:Rectangular   [#permalink] 06 Mar 2008, 20:35
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The figure above shows the dimensions of a rectangular box

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