document.write( "Question 1072572: The volume of a smaller sphere is 288 cm^3. Find the volume of a sphere who's radius is 3 times that of the smaller sphere. Thank you \n" ); document.write( "
Algebra.Com's Answer #687432 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! Volume is a function of the cube of the radius. Triple the radius, and the volume increases 27-fold to \n" ); document.write( "288*27=7776 cm^3 \n" ); document.write( "Can do it from first principles \n" ); document.write( "V=(4/3)pi*r^3=288 \n" ); document.write( "216=pi*r^3 \n" ); document.write( "r^3=216/pi=68.75 cm^3 \n" ); document.write( "r=4.097 \n" ); document.write( "Triple the radius is 12.291 \n" ); document.write( "multiply that by (4/3)*pi*r^3=7778 cm^3. The difference is in the rounding. The 288 cm^3 is multiplied by 27, and that is the best answer. \n" ); document.write( " |