document.write( "Question 1139171: The surface area of a closed cone of height h and base radius r is given by
\n" ); document.write( "A = πr² + πr√(h² + r²).
\n" ); document.write( "Show that h = (A/πr)√(1 - (2πr²/A))
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Algebra.Com's Answer #756950 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
The question is asking to solve for h. Mostly simple algebra.\r
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\n" ); document.write( "\n" ); document.write( "One of your steps should lead to \"h=sqrt%28%28%28A-pi%2Ar%5E2%29%2F%28pi%2Ar%29%29%5E2-r%5E2%29\",
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