document.write( "Question 834353: A right circular cone has a base radius of 2x-5 and a height of 3x. The cone has a volume of 125pi cubic units. Find the possible value(s) of x. \n" ); document.write( "
Algebra.Com's Answer #503028 by ankor@dixie-net.com(22740)\"\" \"About 
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A right circular cone has a base radius of 2x-5 and a height of 3x.
\n" ); document.write( " The cone has a volume of 125pi cubic units.
\n" ); document.write( " Find the possible value(s) of x.
\n" ); document.write( ":
\n" ); document.write( "The Vol of cone: \"1%2F3\"\"pi%2Ar%5E2%2Ah\"
\n" ); document.write( "so we have
\n" ); document.write( "\"1%2F3\"\"pi%2A%282x-5%29%5E2%2A3x\" = \"125%2Api\"
\n" ); document.write( "Get rid of the fraction multiply both sides by 3
\n" ); document.write( "\"pi%2A%282x-5%29%5E2%2A3x\" = \"375%2Api\"
\n" ); document.write( "divide both sides by pi
\n" ); document.write( "\"%282x-5%29%5E2%2A3x\" = \"375\"
\n" ); document.write( "Foil
\n" ); document.write( "\"%284x%5E2-20x%2B25%29%2A3x\" = \"375\"
\n" ); document.write( "\"12x%5E3-60x%5E2%2B75x+-+375+=+0\"
\n" ); document.write( "Group factor
\n" ); document.write( "\"12x%5E2%28x-5%29+%2B+75%28x-5%29+=+0\"
\n" ); document.write( "Factor (x-5)
\n" ); document.write( "(x-5)(12x^2+75) = 0
\n" ); document.write( "one positive solution
\n" ); document.write( "x = 5
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\n" ); document.write( ":
\n" ); document.write( "See if this works out
\n" ); document.write( "r = 2(5) - 5
\n" ); document.write( "r = 5
\n" ); document.write( "h = 3*5 = 15
\n" ); document.write( "Use a calc
\n" ); document.write( "\"1%2F3\"\"pi%2A5%5E2%2A15\" = \"125%2Api\"
\n" ); document.write( "392.7 = 392.7
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