Golo

Need Math help guys

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Ok, need math help again guys, this is about cubes -  I also need to know HOW you figured it out

 

Shawn plans to use 60 inches of wire to build the frames of TWO cubes.  One with side lengths that are 1/3 as long as the other cubes side lengths.  What is the TOTAL volume of the TWO cubes to the nearest hundredeth of a cubic inch?