document.write( "Question 200166: Hi\r
\n" ); document.write( "\n" ); document.write( "A rectangular piece of sheet metal with an area of 800 in^2 is to be bent into a cylindrical length of stovepipe having a volume of 400 in^3. What are the dimensions of the sheet metal?\r
\n" ); document.write( "\n" ); document.write( "thanks for the homework help!
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Algebra.Com's Answer #150568 by ankor@dixie-net.com(22740)\"\" \"About 
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A rectangular piece of sheet metal with an area of 800 in^2 is to be bent
\n" ); document.write( " into a cylindrical length of stovepipe having a volume of 400 in^3.
\n" ); document.write( " What are the dimensions of the sheet metal?
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\n" ); document.write( "Label the rectangular piece of metal as follows:
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\n" ); document.write( "Let h = the length, (will be the length of the pipe)
\n" ); document.write( "Let c = the width, (will be the circumference of the pipe
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\n" ); document.write( "The area of the metal
\n" ); document.write( "h * c = 800
\n" ); document.write( "h = \"800%2Fc\"
\n" ); document.write( ":
\n" ); document.write( "Find the radius from the circumference
\n" ); document.write( "2*pi*r = c
\n" ); document.write( "r = \"c%2F%282pi%29\"
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\n" ); document.write( "The volume:
\n" ); document.write( "pi*r^2*h = 400
\n" ); document.write( ":
\n" ); document.write( "Substitute (c/2pi) for r, and (800/c) for h
\n" ); document.write( "pi*\"c%2F%282pi%29\"*\"c%2F%282pi%29\"*\"800%2Fc%29\" = 400
\n" ); document.write( "cancel out a pi and a c
\n" ); document.write( "\"c%2F2\"*\"1%2F%282pi%29\"*800 = 400
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\n" ); document.write( "\"c%2F%284pi%29\"*800 = 400
\n" ); document.write( "Cancel the 4 into 800
\n" ); document.write( "\"%28200c%29%2Fpi\" = 400
\n" ); document.write( ":
\n" ); document.write( "200c = 400*pi
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\n" ); document.write( "divide 200 into both sides
\n" ); document.write( "c = 2*pi
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\n" ); document.write( "c = 6.283 is the circumference of the pipe
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\n" ); document.write( "Find the height
\n" ); document.write( "h = \"800%2Fc\"
\n" ); document.write( "h = \"800%2F6.283\"
\n" ); document.write( "h = 127.33\" is the height of the pipe
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\n" ); document.write( "The dimensions of the metal: 127.33\" by 6.283\"
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\n" ); document.write( "Check solution by finding the volume with these value
\n" ); document.write( "Find r
\n" ); document.write( "r = \"c%2F%282pi%29\"
\n" ); document.write( "r = \"6.283%2F%282pi%29\"
\n" ); document.write( "r = 1\"
\n" ); document.write( ":
\n" ); document.write( "V = pi*1^2*127.33
\n" ); document.write( "V = 400.0 cu/in
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