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what the heck is that? have no idea please help

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Joined: 23 Apr 2010
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Schools: NYU,UCLA,BOOTH,STANFORD
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Kudos [?]: 72 [0], given: 36

what the heck is that? have no idea please help [#permalink]

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New post 21 Aug 2010, 10:48
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Have no ideas? couldnt move the pen damnn:(

Look at the attachment
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Re: what the heck is that? have no idea please help [#permalink]

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New post 21 Aug 2010, 11:17
fatihaysu wrote:
Have no ideas? couldnt move the pen damnn:(

Look at the attachment


Given rectangular frame area = picture area.

Hence (18 * 15) - (l*b) = (l*b)

(9 * 2 * 5 * 3) = 2 (l*b)

(l*b) = (9 * 5 * 3).

Also given length of frame = 18 units and breadth = 15 units.

(l/b) = (18/15) and l = (18/15)*b

Hence ((18/15) * b * b) = (9 * 5 *3)

b^2 = (9* 5* 3) * 15 / (18)

\(b = 15 / \sqrt{2}\)

Also
\(l = (18/15) * (15 / \sqrt{2})\)

Hence
\(l = 9 \sqrt{2}\).
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Re: what the heck is that? have no idea please help   [#permalink] 21 Aug 2010, 11:17
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