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?

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?

【(50+50+25+25)*2 +50*25】/ 【0.5*05】

A swimming pool is 25 meters long, 15 meters wide and 2 meters deep. How many pieces do you need to paste the four walls and the bottom with square tiles with a side length of 2 decimeters?

The area of four walls and bottom is: 25 × 15 + (25 × 2 + 15 × 2) × 2 = 535 (square meter) = 53500 (square decimeter)
Area of each square tile: 2 × 2 = 4 (square decimeter)
The number of tiles required: 53500 △ 4 = 13375 (pieces)
A: it costs 13375 yuan

A cuboid swimming pool is 12 meters long, 8 meters wide and 2.5 meters deep. How many pieces of square white tiles with a length of 2 decimeters are pasted on the four walls and the bottom of the pool

12/0.2=60,8/0.2=40,2.5/0.2=12.5