document.write( "Question 610773: The slant height of the cone is 25 units and its lateral surface area is 550 square units. Find the radius of the cone. (Round the answer to the nearest tenth.)\r
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Algebra.Com's Answer #384562 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
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\n" ); document.write( "\n" ); document.write( "Surface Area = Area of Base + lateral Area
\n" ); document.write( " 550 = \"pi%2Ar%5E2+%2B+pi%2Ar%2As\" where s is the slant height
\n" ); document.write( " 550/3.14 = \"r%5E2+%2B+25r\" or
\n" ); document.write( " r^2 + 25r - 175.1 = 0
\n" ); document.write( "\"r+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"r+=+%28-25+%2B-+sqrt%28+1325.4+%29%29%2F%282%29+\"
\n" ); document.write( " r = 5.7 units (tossing out negative solution for length)\r
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