A small bridge sits atop four cube shaped pillars that's all have the same volume. The combined volume of the four pillars are 500ft3 how many inches long are the sides of the pillars

Each cube separately has a volume of 125 ft^3, and the formula for a cubes volume is L x W x H. That means the solution is the cube root of 125, or simply, each side is 5 inches long. This is because 5 x 5 x 5 is equal to 125