document.write( "Question 1201847: A rectangular piece of sheet metal with an area of 1200 in2 is to be bent into a cylindrical length of stovepipe having a volume of 600 in3. What are the dimensions of the sheet metal? (Round your answer to one decimal place.) \n" ); document.write( "
Algebra.Com's Answer #836381 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "Let x be the width of the piece of sheet metal, and let y be its length.

\n" ); document.write( "Roll the sheet lengthwise to form the cylinder; the height of the cylinder is x and the circumference of the cylinder is y. Then the radius of the cylinder is circumference divided by 2pi, or y/(2pi).

\n" ); document.write( "Then

\n" ); document.write( "[1] \"xy+=+1200\" [the area of the piece of sheet metal is 1200 sq in]
\n" ); document.write( "[2] \"%28pi%29x%28y%5E2%2F%284pi%5E2%29%29=600\" [the volume of the cylinder (\"%28pi%29%28r%5E2%29h\") is 600 cu in]

\n" ); document.write( "Substitute [1] in [2]:

\n" ); document.write( "\"%28pi%29%28xy%29%28y%29%2F%284pi%5E2%29=600\"
\n" ); document.write( "\"%28pi%291200%28y%29%2F%284pi%5E2%29=600\"
\n" ); document.write( "\"2y%2F%284pi%29=1\"
\n" ); document.write( "\"2y=4pi\"
\n" ); document.write( "\"y=2pi\"

\n" ); document.write( "Substitute that in [1] to find x:

\n" ); document.write( "\"x%282pi%29=1200\"
\n" ); document.write( "\"x=600%2Fpi\"

\n" ); document.write( "ANSWERS:
\n" ); document.write( "width: \"x=600%2Fpi\"
\n" ); document.write( "length: \"y=2pi\"

\n" ); document.write( "You can evaluate those dimensions and do the rounding....

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