What's the surface area of a cuboid made of three cuboids with 10 cm edges?

What's the surface area of a cuboid made of three cuboids with 10 cm edges?

10 × 3 = 30 cm
30 × 10 × 4 = 1200 square centimeter
10 × 10 × 2 = 200 square centimeter
1200 + 200 = 1400 square centimeter

How much is the surface area of the cuboid?

Two small cubes are put together to form a cuboid, and the long edge is 20cm long,
The surface area of cuboid = (10cm * 20cm) * 4 + 10cm * 10cm * 2 = 1000 square centimeter

A cube with 9cm edge length is sawed into several small cubes with 3cm edge length, and the surface area increases by () cm;

The surface area increased: 27 × 3 × 3 × 6-9 × 9 × 6 = 18 × 3 × 3 × 6 = 972cm;

The figure on the right is made up of a cube with an edge length of 1cm, its surface area is () CM & # 178;, its volume is () CM & # 179;
I'm in a hurry tonight. Write the calculation

The volume of each small cube = 1 × 1 × 1 = 1 (cubic centimeter) its volume = the sum of the volumes of five small cubes = 1 × 5 = 5 (cubic centimeter) each cube has six bottom surfaces of equal area, each bottom surface area = 1 × 1 = 1 (square centimeter) five small cubes have a total of 6 × 5 = 30 bottom surfaces