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The rectangular sheet of metal has a length of 15cm and a

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Manager
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Joined: 25 Feb 2008
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The rectangular sheet of metal has a length of 15cm and a [#permalink] New post 21 Mar 2008, 05:20
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The rectangular sheet of metal has a length of 15cm and a width of 12cm. An open box to be constructed from the sheet by cutting a square of side n cm from each corner, folding the resulting projections up and welding the seams together. What will the volume of the box be terms of n?
180-54n^2+4n^2
180-4n^2
180n+54n^2+4n^3
180n-54n+4n^2
180n-54n^2-4n^3
Please explain your answer.
Optional: time you spend on this question
VP
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Joined: 22 Oct 2006
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Re: the rectangular sheet of metal [#permalink] New post 21 Mar 2008, 05:33
The answers aren't reduced? Anyway I'd go with E. Draw the box and visual the three sides and multiply the sides together. (15-2N)(12-2N)(N)
Senior Manager
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Re: the rectangular sheet of metal [#permalink] New post 21 Mar 2008, 10:04
I think something is off in the answer choices.

Correct answer should be 180n-54n^2+4n^3 - I don't see it listed.
Re: the rectangular sheet of metal   [#permalink] 21 Mar 2008, 10:04
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The rectangular sheet of metal has a length of 15cm and a

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