48( 12×2-8)= 3 (cm) side length
3×3×3=27 cubic centimeters.
2. The bottom is a square cuboid with a circumference of eight meters. What is the volume of this cuboid?
How about Gao?
3. The side length of the cube fish tank is 40 cm. If you put in 38.4 liters of water, how many centimeters is the water surface from the upper mouth?
40 cm =4 decimeters
4-38.4(4×4)= 4-2.4 = 1.6 (decimeter)
There is a cuboid iron sheet with a length of 40 cm and a width of 30 cm, and the square with equal area is subtracted from the four corners, which can just be folded into an uncovered iron box with a depth of 8 cm. Find the surface area of this iron box.
40× 30-8× 8× 4 =1200-256 = 944 (square centimeter)