If the height of a cuboid is increased by 3 cm, it will become a cube, and the surface area will be increased by 84 square cm. What is the volume of the original cuboid

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• 1. If the height of a cuboid is 40 cm and its cross section is a cube, if the height is increased by 4 cm, the surface area will be increased by 80 square cm, and the original surface area will be calculated
• 2. If the height of a cube increases by 4cm, it becomes a cuboid. The surface area of the cuboid is just 80 square meters more than that of the original cuboid. What is the original volume of the cuboid? Use the formula and write the meaning
• 3. The surface area of a cuboid is 84 square centimeters. Cut it into three equal cubes. The surface area of each cube is () square centimeters
• 4. Saw a 6 decimeter long cuboid wood into three sections on average, the surface area increased 196 square centimeters, how many cubic centimeters is the volume of this wood?
• 5. Cut a 3.5 decimeter cuboid wood into 6 sections on average. The surface area is 125 square centimeter more than the original. Calculate the original volume of this section of wood
• 6. A cuboid of wood, saw the wood into two sections, the surface area increased by 32 cubic centimeters, the original volume of this wood is how many cubic decimeters
• 7. Saw a 5 meter long cuboid wood into three sections, the surface area increased 160 square centimeters, the volume of this wood is () cubic decimeter It's urgent!
• 8. 1: A conical machine parts, the bottom area is 27 square centimeters, 5 meters high. The volume of this part is how many cubic centimeters? 2: A pile of cone-shaped sand, the perimeter of the bottom is 12.56 meters, 5 meters. Each cubic meter of sand weighs 1.6 tons. How many tons of sand does this pile have? (the number is reserved for two decimal places) 3: When a conical metal part is immersed in a cube container with an edge length of 8 cm, the water surface rises by 3 cm without water overflow. What is the volume of the part?
• 9. The wood of a cuboid is 2 meters long. After sawing it into three sections, the surface area increases by 24 square decimeters. What is the volume of the cuboid
• 10. A 9 decimeter long cuboid wood is sawn into three cuboids on average. The surface area is increased by 2.4 square decimeters. The volume of this wood is () cubic decimeters A. 3.6B. 5.4C. 7.2D. 10.8
• 11. The height of a cuboid is reduced by 3 cm to become a cube, and the surface area is reduced by 84 square centimeters. The volume of the cube is several cubic centimeters
• 12. The volume of a cuboid is 250 cubic centimeters and its height is 5cm. How many square centimeters is its bottom area
• 13. The side area of a cylinder is 18.84 square centimeters, the height is 10 centimeters, the bottom area is (), and the volume is ()
• 14. The side area of a cylinder is 314 square centimeters, the volume is 942 cubic centimeters, and its bottom area is___ Square centimeter
• 15. The side area of a cylinder is 942cm2, its volume is 2355cm3, and its bottom area is______  cm2．
• 16. The side area of a cylinder is 18.84 square centimeters, the height is 10 centimeters, and its volume is () cubic centimeters
• 17. The height of the cylinder increases by 3 cm, and the surface area increases by 18.84 square cm. If the original height of the cylinder is 10 cm, what is the original volume of the cylinder? (the problem should be solved in detail)
• 18. The volume of a cone is 84 cubic centimeters, the bottom area is 21 square centimeters, and the height is 10______ Cm
• 19. A square steel with an edge length of 8 cm is forged into a cuboid steel with a cross-sectional area of 4 square cm. How long is the cuboid steel
• 20. Use a steel block with a volume of 2000 cubic centimeters to forge a rectangular square steel with a cross section of 20 square centimeters. How many centimeters is the square steel long?