The bottom of a 1.5-meter-long cuboid wood is square, and the bottom remains unchanged. After sawing the wood into two cuboids, the surface area increases by 0.18 square decimeter, which is the same as the original one What is the surface area of the wood?

The bottom of a 1.5-meter-long cuboid wood is square, and the bottom remains unchanged. After sawing the wood into two cuboids, the surface area increases by 0.18 square decimeter, which is the same as the original one What is the surface area of the wood?

Two sides are added after sawing
So the area of one side is 0.18 △ 2 = 0.09 (square decimeter)
The original cuboid has four sides
The lateral area is 4 × 0.09 = 0.36 (square decimeter)
1.5m=15dm
0.09 △ 15 = 0.006 (decimeter)
Then calculate the bottom area 0.006 × 0.006 × 2 = 0.000072 (square decimeter)
Then surface area = side area + bottom area = 0.36 + 0.000072 = 0.360072 (square decimeter)

In a cuboid, a = 2.5m, B = 60dm, H = 3M

60dm=6m
2×(2.5×6+2.5×3+6×3)=2×(15+7.5+18)=2×40.5=81(m²)
2.5×6×3=45(m³)
A: the cuboid has a surface area of 81 square meters and a volume of 45 cubic meters

Find the surface area or volume of a cuboid: a cuboid with a side length of 0.3m on its bottom and a height of 0.5m
2. A cuboid wooden box is 1.8m long, 12dm wide and 0.8m high. What is the volume of the cuboid wooden box? If the inside and outside of the wooden box are painted, what is the area of painting? (the thickness of the wooden board is ignored)

Volume:
1.8m=18dm
0.8m=8dm
12 × 8 × 18 = the third power of 1728dm
Painting:
The second power of 18 × 12 + 8 × (18 + 12) × 2 = 216 + 480 = 696dm