Place 20 cubes whose edges are 1 cm long into a cuboid whose height is 2 cm. The surface area of the cuboid is () or ()

Place 20 cubes whose edges are 1 cm long into a cuboid whose height is 2 cm. The surface area of the cuboid is () or ()

20＝2×2×5＝2×1×10
So the length and width are 5 and 2, respectively
Or 10 and 1
The surface areas are
(5 × 2 + 5 × 2 + 2 × 2) × 2 = 48 (cm2)
perhaps
(10 × 1 + 10 × 2 + 1 × 2) × 2 = 64 (square centimeter)

A cuboid can be divided into two small cubes from the middle. At this time, the surface area increases by 20 square centimeters. The original surface area of the cuboid is______ Square centimeter

20 △ 2 × (12-10) = 10 × 10 = 100 (square centimeter); answer: the original surface area of the cuboid is 100 square centimeter

Divide a cube with an edge length of 20 cm into two identical cuboids. The surface area of each cuboid is______ ．

The length of each cuboid: 20 △ 2 = 10 cm, the width and height are 20 cm, 10 × 20 × 4 + 20 × 20 × 2 = 800 + 800 = 1600 (square cm). Answer: the surface area of each cuboid is 1600 square cm. So the answer is: 1600 square cm