document.write( "Question 197466: What is x in the given surface area of a right cylinder?\r
\n" ); document.write( "\n" ); document.write( "S=1000 cm2\r
\n" ); document.write( "\n" ); document.write( "S=2(3.14)r2+2(3.14)h2\r
\n" ); document.write( "\n" ); document.write( "h= x\r
\n" ); document.write( "\n" ); document.write( "r= 8 ft\r
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Algebra.Com's Answer #148097 by Alan3354(69443)\"\" \"About 
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What is x in the given surface area of a right cylinder?
\n" ); document.write( "S=1000 cm2
\n" ); document.write( "S=2(3.14)r2+2(3.14)h2
\n" ); document.write( "h= x
\n" ); document.write( "r= 8 ft
\n" ); document.write( "-------------
\n" ); document.write( "\"S=2%283.14%29r%5E2%2B2%283.14%29h%5E2\"
\n" ); document.write( "\"1000=2%2A%283.14%29%2A8%5E2%2B2%2A%283.14%29%2Ah%5E2\"
\n" ); document.write( "\"1000%2F%282pi%29+=+64+%2B+h%5E2\"
\n" ); document.write( "\"h%5E2+=+%281000%2F%282pi%29%29+-+64\"
\n" ); document.write( "\"h%5E2+=+95.155\"
\n" ); document.write( "h = 9.755 cm
\n" ); document.write( "----------------- Using the eqn you gave.
\n" ); document.write( "The total surface area of a cylinder is 2 times the base, for top and bottom, + the cylindrical surface.
\n" ); document.write( "\"A+=+2%2Api%2Ar%5E2+%2B+2%2Api%2Ar%2Ah\" not h squared
\n" ); document.write( "\"1000+=+2%2Api%2Ar%2A%28r%2Bh%29\"
\n" ); document.write( "\"1000%2F%282%2Api%2Ar%29+=+r%2Bh\"
\n" ); document.write( "1000/50.2655 = 8+h
\n" ); document.write( "h+8 = 19.89
\n" ); document.write( "h = 27.89 cm
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