Write an equation to solve each problem.

Question

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

Answer 1

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.

Answer 2

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

Answer 3

Take the cube root of each side.

Answer 4

Thanks for your help!