A rectangular pool is 20 meters long, 10 meters wide and 2 meters deep. How many square meters does the pool cover

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• 1. A bathroom is 2.4 meters long and 1.8 meters wide. How many square meters does it cover?
• 2. The height of a cylindrical carton is 15cm. If the height is reduced by 2cm, the surface area will be reduced by 188.4cm I learned 188.4 △ 2 = 94.2 (CM) 94.2 △ 3.14 △ 2 = 15 (CM) 15 × 15 × 3.14 = 706.5 (square cm) 94.2 × 15 = 1413 (square cm) 706.5 × 2 + 1413 = 2826 (square cm)
• 3. A cylindrical carton is 15 cm high. If the height is reduced by 2 cm, the surface area will be reduced by 188.4 square cm
• 4. A cylindrical carton is 15 cm high. If the height is reduced by 2 cm, the surface area will be reduced by 188.4 square cm
• 5. A cylinder is 15cm in height and 188.4cm2 in volume. If you cut it into two identical cylinders, how much will the surface area increase?
• 6. The diameter of the bottom surface of a cylinder is 4 cm, the height is 15 cm, and its side area is 1______ Square centimeter, the surface area is______ Square centimeter, the volume is______ Cubic centimeter
• 7. The bottom of a carton without cover is a square with an area of 100cm and height of 15cm. Put a wooden stick in the carton and the stick is 2cm out of the carton. Find the value range of the total length of the stick
• 8. The bottom of a carton without cover is a square with an area of 100cm & sup2; and the height is 15cm. Put a wooden stick in the carton and the stick is 2cm out of the carton The bottom of a carton without cover is a square with an area of 100cm & sup2; and the height is 15cm. Put a wooden stick in the carton and the stick is 2cm out of the carton. Calculate the value range of the total length of the stick.
• 9. Xiao Li's birthday is coming. Xiao Hua is going to give Xiao Li a birthday present. It's packed in a cuboid box of 10 cm long, 12 cm wide and 10 cm high. Xiao Hua wants to wrap the box with wrapping paper. How many square centimeters of wrapping paper do you need
• 10. Xiao Li wants to use a square piece of paper with an area of 400cm and cut a rectangular piece of paper with an area of 300cm along the side, Make the ratio of length to width 3:2, please explain whether Xiaoli can use this piece of paper to cut rectangular pieces
• 11. 1. A cuboid, 4 meters long and 3 meters wide, covers an area of () square meters at most and () square meters at least 1. A cuboid, 4 meters long and 3 meters wide, covers an area of () square meters at most and () square meters at least. 2. The surface area of a cuboid is 24 square decimeters, and it is divided into two identical cuboids, each with a surface area of () square decimeters. 3. There is a glass fish tank without a cover, 20 cm long, 15 cm wide and 10 cm high, Do such a pair of fish tank need () square decimeter of glass, a total of water () liter
• 12. Mingmingjia has two cartons of the same size (as shown in the picture). How to put these two cartons? What is the minimum floor area? How many square meters is the floor area? The cartons are 1.2 meters long It is 0.6m wide and 0.5m high
• 13. There is a 1.4 meters long, 1.2 meters wide, 0.8 meters high rectangular carton on the ground. How many square meters is the minimum floor area and how many square meters is the maximum floor area
• 14. On the conversion of civil housing use area and construction area! The usable area is 21.5 square meters. How many square meters is the building area? How to calculate? Please don't paste a lot of I just want an answer. The floor area of my small apartment is 21.5 square meters, single balcony and side guard. What's the building area? The house was built in 1990 (brick concrete structure)!
• 15. How to calculate the room area How many square meters is a room 2.1 meters long and 2.1 meters wide?
• 16. How to calculate the floor area of a house
• 17. What percentage of the total area of Tibet
• 18. China's mountainous area accounts for about a few percent of the total land area emergency
• 19. What's the area of the ocean on earth?
• 20. The rose planting area in the botanical garden accounts for 2 / 9 of the total area, and the rose accounts for 1 / 3 of the total area. Which kind of flower has the largest planting area? How much is it?