Unit 3 evaluation and testing 1. Judge. 1, the volume of the wooden box is the volume of the wooden box. () 2. When the side length of a cube is enlarged by 3 times, its surface area is enlarged by 27 times. () 3. Of the 12 sides of a cuboid, all four parallel sides are equal. () 4. Cut a cuboid into two equal cubes, and the surface area of each cube is half that of the cuboid. () Second, multiple-choice questions. 1, a car tank can hold 50 () gasoline. A, liter B, milliliter C, square 2, immerse a cubic iron block in a container filled with water, and the water surface (). A, raise B, lower C, and remain unchanged 3. Two cubes with equal volumes, the total length of their sides is 24 cm, and the volume of each cube is (). A, 1 cm3 b, 2 cm3 c,16cm3 4, a cuboid water tank with a volume of100L. The bottom of this water tank is a square with a side length of 5 decimeters, so the height of the water tank is (). A, 20 decimeters b, 10 decimeters c, 4 decimeters 3. Fill in the blanks. A cube with 1 and 1 cubic decimeter can be divided into () cubes with 1 cubic centimeter. 2, 4.05 liters = () ml. 3, 0.7 square meters = () square decimeter 4, painting on the outside of a rectangular iron drum without a cover, it needs to spray () surfaces. 5. The area of a cube with a side length of 1 m is () cubic meters. 6. A cuboid has () faces, () sides and () vertices. 7. The volume of a cube with a surface area of 54 square centimeters is () cubic centimeters. 8.5.07 cubic meters = () cubic meters () cubic decimeter 9. The rectangular body is 2 meters long, and its width and height are half of it. The surface area of this cuboid is () square decimeter and the volume is () cubic decimeter. Fourth, the application problem. 1, find the surface area and volume of a cuboid with a length of 7 decimeters and a width of 2 decimeters. 2. Find the surface area and volume of a cube with a side length of 5 decimeters. 3. Use a car with a cuboid carriage to transport coal. The length measured from the inside is 3 meters, the width is 2.5 meters and the height is 0.4 meters. If the weight of coal per cubic meter is 1.4 tons, how many tons will five identical cars transport coal at a time? 4. Fifty math books are arranged into a cuboid with a length of 18cm, a width of 13cm and a height of 25cm. What is the average volume of each book? 5. How many square decimeters does a carpenter need to make a 5-centimeter-long cubic wooden box without cover? 6. Forging a cubic iron block with a side length of 10 cm into a rectangular iron bar with a width of 5 cm and a height of 10 cm. How long is this iron bar?