Current location - Health Preservation Learning Network - Fitness coach - A swimming pool is 50m long, 30m wide and1.8m deep. (1) spread a layer of cement around and at the bottom of the pool. What is the area of the cement plastering part?
A swimming pool is 50m long, 30m wide and1.8m deep. (1) spread a layer of cement around and at the bottom of the pool. What is the area of the cement plastering part?
Solution: (1) "Around the bottom of the pool" is five faces of a cuboid.

∴s=﹙ah+bh﹚×2+ab=﹙50× 1.8+30× 1.8﹚×2+50×30= 1788﹙㎡﹚

﹙2﹚V=abh=50×30× 1.5=2250﹙? ﹚

Answer: The plastering area is 1788㎡, and 2250? Water.