A swimming pool, 50 meters long, 20 meters wide, 4 meters deep. Now we need to paste 2 decimeter square tiles in this swimming pool. How many tiles do we need to paste this

The pool bottom needs 25000 pieces, the four sides need 14000 pieces, 25000 + 14000 = 39000 pieces, a total of 39000 pieces

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1. The playground will build a cuboid swimming pool, 40 meters long, 10 meters wide and 1.5 meters deep. The walls and floor of the pool will be paved with ceramic tiles, if 25 tiles are used per square meter How much is it?
2. Every day, the swimming pool is 25 meters long, 10 meters wide and 1.6 meters deep. Build ceramic tiles around the swimming pool and at the bottom of the pool. If you use a square with an area of 1 square decimeter, you need ceramic tiles
3. A swimming pool is 50 meters long, 25 meters wide and 3 meters deep on average. If you want to stick tiles on the four walls of the swimming pool, what is the area of tiles? It's clear,
4. Build a rectangular swimming pool, 30 meters long, 10 meters wide and 1.5 meters deep. The four walls and bottom of the pool are paved with ceramic tiles. If there are 25 ceramic tiles per square meter, How much is the process
5. A swimming pool is 50 meters long, 25 meters wide and 2 meters deep. When it is built, it is necessary to paste ceramic tiles on its four walls and bottom. At least, how many square meters of ceramic tiles should be pasted?
6. A new swimming pool will be built in the gymnasium. The length, width and depth of the swimming pool are 50 meters, 20 meters and 2.5 meters respectively How many square meters of ceramic tile?
7. A swimming pool is 50 meters long, 25 meters wide and 2 meters deep. How many tiles are needed to paste 4 square decimeters of tiles on the four walls and bottom of the swimming pool?
8. If tiles are placed at the bottom and around the swimming pool, what is the area of tiles [length 100m, width 60m, average depth 2m] It's urgent to calculate,
9. A swimming pool with a length of 100m and a width of 60m, with an average depth of 2m, needs to be excavated
10. A reservoir. The depth of the reservoir is 3.5 meters. There is 2 meters of water in it. The volume of water is 18 cubic meters. How many square meters is the bottom area of the reservoir M, what's the volume of the reservoir?
11. In a swimming pool 20 meters long, 8 meters wide and 1.5 meters deep, tiles are pasted. The side length of a square tile is 5 decimeters. How many tiles do you need?
12. The cuboid swimming pool is 50 meters long, 25 meters wide and 2 meters deep. If the inner wall of the swimming pool is covered with tiles, how many tiles are needed with a side length of 5 decimeters?
13. A school wants to build a cuboid swimming pool, which is 50 meters long, 25 meters wide and 2.5 meters deep. If the tiles of 2 decimeters long are pasted at the bottom and around, at least a few pieces are needed Enough? If you inject 10 cubic meters of water per minute How many hours does it take to make the water depth 1.2 meters?
14. The length of a swimming pool is 50 meters, the width is 25 meters, and the depth is 2 meters. How many cubic meters of soil have been excavated to build this swimming pool? Put a layer of cement on the side and bottom of the pool. What is the area of cement? (formula)
15. A swimming pool is 50 meters long, 25 meters wide and 2.5 meters deep. How many square meters of ceramic tiles should I buy at least for the surrounding and bottom of the pool
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17. The two sides of the equation x - 5x + 6 = 0 are
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