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The length of each edge of a cube is decreased by 40%. By what percent does the volume of the cube decrease? Express your answer to the nearest tenth.

 Mar 5, 2021
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Cube volume = x * x* x =  x3

   now change to .6x

      .6 x * .6x  * .6x = .216  x3  

 

It is now   .216 of its original volume    a dcrease of   1 - .216 = .784    or 78.4 % decrease      

 Mar 5, 2021

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