document.write( "Question 1104650: the area of the rectangle varies jointly with its length and width. The area of the rectangle is 50cm^2 when its length measures 5 and width of 10. Find the area of the rectangle if its width meausre 12cm and length of 8cm. Joint variation? \n" ); document.write( "

Algebra.Com's Answer #719422 by josgarithmetic(39838) $\"\"$ $\"About$

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\n" ); document.write( "the area of the rectangle varies jointly with its length and width.
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\n" ); document.write( "\n" ); document.write( "L for length and w for width.
\n" ); document.write( "You already know that for area A of a rectangle, $\"A=wL\"$ . If you are reading the variation language then you might believe you need a variation constant, k, and say $\"A=kwL\"$ , but you should not need it, since it is 1.\r
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\n" ); document.write( "The area of the rectangle is 50cm^2 when its length measures 5 and width of 10.
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\n" ); document.write( "\n" ); document.write( " $\"50=10%2A5\"$ \r
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\n" ); document.write( "\n" ); document.write( "You know all that you need. \n" ); document.write( "

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