The volume of the cube is 729 m3. What is the length of its rib?

The volume of a cube is found by the formula: V = a ^ 3, where a is the edge of the cube. From here, knowing the value of the volume of the cube, we can express the value of a, that is, the edges of the cube.
a ^ 3 = 729;
a = 3√729;
a = 3√ (27 * 27);
a = 3 * 3;
a = 9 m is the length of the edge of a given cube.
Answer: the length of the edge of the cube is 9 m.