document.write( "Question 884809: The ratio of the sides of two cubes is 2:3 and the difference of their volume is 152 cm^3. What is the length of the side of the bigger cube? \r
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document.write( "Thank you very much :) \n" );
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Algebra.Com's Answer #534703 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The ratio of the sides of two cubes is 2:3 and the difference of their volume is 152 cm^3. \n" ); document.write( " What is the length of the side of the bigger cube? \n" ); document.write( ": \n" ); document.write( "Let x = the multiplier \n" ); document.write( "then \n" ); document.write( "2x = side of the smaller cube \n" ); document.write( "and \n" ); document.write( "3x = side of the larger \n" ); document.write( ": \n" ); document.write( "Then we can write an equation for the problem like this: \n" ); document.write( "(3x)^3 - (2x)^3 = 152 \n" ); document.write( "27x^3 - 8x^3 = 152 \n" ); document.write( "19x^3 = 152 \n" ); document.write( "x^3 = 152/19 \n" ); document.write( "x^3 = 8 \n" ); document.write( "Find the cube root of 8 \n" ); document.write( "x = 2 \n" ); document.write( "therefore \n" ); document.write( "3(2) = 6 cm is side of the larger cube \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "See if this checks out; calculate: 6^3 - 4^3 \n" ); document.write( " \n" ); document.write( " |