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Shadow

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Write an equation to solve each problem.

The sides of one cube are twice as long as the sides of a second cube. What is the side length of each cube if the total volume of the cubes is 72 cm^3?

Would it be, 3x+6x=72? Thanks

  • Shadow - ,

    No. It wouldn't be that.

    volumes of cubes is V=s^3 where s is side length.

    72= s^3+ (2s)^3= s^3+8s^3
    72=9s^3
    and you find s, the side length of the smaller cube, and 2s is the side length of the larger cube.

  • Shadow - ,

    I came up with 8=s^3, how would I solve this? Thanks

  • Shadow - ,

    Take the cube root of each side.

  • Shadow - ,

    Thanks for your help!

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