After the cuboid's height = width and length - 2.5cm, it is a cube with a surface area of 150 square cm. What's the cuboid's volume?

After the cuboid's height = width and length - 2.5cm, it is a cube with a surface area of 150 square cm. What's the cuboid's volume?

Let X be the side length of a cube,
Then the surface area is 6x * x = 150. The side length is 5cm
So the length of the original cuboid is 5 + 2.5 = 7.5cm,
So the volume of the cuboid is 7.5 * 5 * 5 = 187.5 cubic centimeters