A cuboid wood is 4m long, 3DM wide and 3DM high. After sawing it into two sections, how many square decimeters has the surface area increased?

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• 1. A rectangular piece of glass, 5 decimeters long, 3 decimeters wide, the remaining part is a square. Known cut area is 71 square decimeters, then the remaining square area is______ Square decimeter
• 2. There is a rectangle. If its width is reduced by 2 mm or its length is reduced by 3 DM, its area will be reduced by 24 square decimeters. What is the original area of this rectangle?
• 3. A rectangular wood block is cut off 2DM from the top and 3DM from the bottom, and the rest is just a square. The known cut-off area is 120 square decimeters. Calculate the volume of the original cuboid
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• 11. How many square decimeters has the surface area increased after sawing it into two sections,
• 12. How many square decimeters has the surface area increased after sawing it into two sections? (fast) Respondent: 784252835 This responder, so that I can understand
• 13. A 2.5m long cuboid wood has a square bottom and a side length of 3DM. If the wood is said to be divided into three sections, how many square decimeters will the surface area increase? Tell me why
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