document.write( "Question 1013447: a cylindrical tank 5 ft in diameter and 10 ft high is half full of water. if the water level rises to 7 ft after putting a cubical stone in the tank, find the edge of the cube
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Algebra.Com's Answer #629727 by Boreal(15235)\"\" \"About 
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volume of a cylinder is pi*r^2h
\n" ); document.write( "at 5 feet, it is pi*2.5^2*5=31.25 pi
\n" ); document.write( "at 7 feet, it is pi*2.5^2*7=43.75 pi
\n" ); document.write( "The difference is 12.5 pi=39.27 cubic feet
\n" ); document.write( "That is the volume of the cube.
\n" ); document.write( "A side is the cube root of the volume.
\n" ); document.write( "3.40 feet is the length of the side.
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