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

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

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Total area: 25 × 10 + (25 + 10) × 2 × 1.6 = 362 (square meter) = 36200 (square decimeter)
Ceramic tile required: 36200 △ 1 = 36200 (pieces)

A swimming pool is 25m long, 15m wide and 2m deep. How many pieces of square tiles are needed to paste the four walls and the bottom with an area of 4dm2?

4 square decimeter = 0.04 square meter, (25 × 15 + 25 × 2 × 2 + 15 × 2 × 2) △ 0.04, = (375 + 100 + 60) △ 0.04, = 535 △ 0.04, = 13375 (pieces), a: 13375 pieces are needed

A cuboid swimming pool is 20 meters long, 15 meters wide and 2 meters deep. Now we need to put cement on each side of the swimming pool, and then paste ceramic tiles with a length of 4 decimeters. How many such tiles are needed? If 5 kg of cement is used per square meter, how much cement will be used?

4 decimeter = 0.4 meter, 20 × 15 + (20 × 2 + 15 × 2) × 2, = 300 + 140, = 440 (square meter), 440 ^ (0.4 × 0.4), = 440 × 0.16, = 2750 (piece); 440 × 5 = 2200 (kg); answer: if you need 2750 tiles like this, you need 2200 kg of cement