kokeshjude17 kokeshjude17

02-07-2016
Mathematics

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The length of the room is 3 times the width and the total area of the room is 27 square meters. What is the length of the living room?

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konrad509 konrad509

02-07-2016

[tex]l=3w\\ lw=27\\\\ 3w\cdot w=27\\ 3w^2=27\\ w^2=9\\ w=3 \vee w=-3\\ -3\not\in\mathbb{N}\\\\ l=3\cdot3\\ l=9 [/tex]

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