document.write( "Question 560114: The surface area of a sphere is directly proportional to the square of its radius r. The volume v of the sphere is directly proportional to the cube of its radius r. Find the percentage increase in v when s increases by 25%. \n" ); document.write( "
Algebra.Com's Answer #363678 by Alan3354(69443)\"\" \"About 
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The surface area of a sphere is directly proportional to the square of its radius r. The volume v of the sphere is directly proportional to the cube of its radius r. Find the percentage increase in v when s increases by 25%.
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\n" ); document.write( "A 25% increase --> 1.25 times the area
\n" ); document.write( "Change in radius = \"sqrt%281.25%29\"
\n" ); document.write( "Change in volume = \"%28sqrt%281.25%29%29%5E3\" =~ Vol*1.3975
\n" ); document.write( "=~ 39.75% increase in volume
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