A cuboid can be divided into three identical cubes. If the next cube is cut, the remaining surface area will be reduced by 36 square decimeters What is the volume of the original cuboid?

A cuboid can be divided into three identical cubes. If the next cube is cut, the remaining surface area will be reduced by 36 square decimeters What is the volume of the original cuboid?

If the next cube is cut, the remaining surface area will be reduced by 36 square decimeters. It shows that the side area of a cube is 36 square decimeters, then the area of a face is 36 / 4 = 9 square decimeters, and the side length is 3 decimeters
So the original length is 3 * 3 = 9 decimeters. The original volume is 9 * 9 = 81 cubic decimeters

How many square decimeters is the surface area of the cuboid

3x3x (6x2-2) = 3x3x10 = 90 square decimeters
Answer: cuboid surface area 90 square meters

Xiaoming needs at least () square centimeter cardboard to make a 10 centimeter long paperless carton
Cut a cube whose edge is 6cm long into three identical rectangles and increase its surface area by () square centimeter

Xiaoming needs at least (600) square centimeter cardboard to make a 10 centimeter long paperless carton
Cut a cube with 6 cm edge length into three identical rectangles, and the surface area is increased by (144) square centimeters