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what the heck is that? have no idea please help

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Joined: 23 Apr 2010
Posts: 140
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Schools: NYU,UCLA,BOOTH,STANFORD
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Kudos [?]: 12 [0], given: 36

what the heck is that? have no idea please help [#permalink] New post 21 Aug 2010, 09:48
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Have no ideas? couldnt move the pen damnn:(

Look at the attachment
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Kudos [?]: 119 [0], given: 50

Re: what the heck is that? have no idea please help [#permalink] New post 21 Aug 2010, 10:17
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, 10:17
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