A reservoir is 8 meters long, 5 meters wide and 3 meters deep. ① how large is the area of the reservoir? ② how large is the area of cement plastered on the bottom and around the reservoir? ③ how many liters of water can the reservoir store at most?

To dig a 25 meter long, 4 meter wide and 2.4 meter deep reservoir, how many cubic meters of earth and stone are excavated? If cement is used to wipe the surrounding and bottom surface, what is the area of cement?

25x4x2.4 = 240m3
Area = 25x4 + 2.4x25x2 + 4x2.4x2 = 239.2m2

A reservoir is 3 meters deep. Its bottom is 50 meters long and 25 meters wide. How many square meters is the bottom area of the reservoir?

The floor area is 1250 square meters

A rectangular pool is 20 meters long, 10 meters wide and 2.5 meters deep. What is the area of cement plastering around and on the bottom of the pool?

Calculate the surface area
The surface is:
2×（20×2.5+10×2.5）+20×10
=2×（50+25）+200
=150+200
=350 square meters

A rectangular pool is 20m long, 15m wide and 2m deep. Plaster cement on its four walls and bottom surface, and calculate the area of cement. 2

20*15+20*2*2+15*2*2
=300+80+60
=440 square meters

A rectangular pool is 20m long, 15m wide and 2m deep. Cement its four walls and bottom to find the area of cement

S = 20 * 15 + 20 * 2 * 2 + 15 * 2 * 2 = 440 (M2)

There are two pools, large and small. The large pool has 4000 cubic meters of water and the small pool has 1500 cubic meters. Now, after injecting the same water into the two pools
The water volume of large pool is twice that of small pool. How many cubic meters of water is injected into each pool?

Each pool is filled with X cubic meters of water
4000+x=2(1500+x)
4000+x=3000+2x
x=1000
Each pool is filled with 1000 cubic meters of water

There are two pools, large and small. There are 300 cubic meters of water in the large pool and 70 cubic meters in the small pool. Now, the same amount of water is injected into the two pools, so that the water volume of the large pool is three times that of the small pool. How many cubic meters of water should be injected into each pool?

According to the meaning of the question: the difference of their water volume is: 300-70 = 230 (cubic meters); when the water volume of the large pool is three times that of the small pool, the water volume of the small pool is: 230 ÷ (3-1) = 115 (cubic meters); the injected water is: 115-70 = 45 (cubic meters). A: each pool should be injected with 45 cubic meters of water

The round pool is 4000 long. If the pool is one meter deep, how many cubic meters of water can the pool hold?

Radius = 4000 ／ 3.14 ／ 2 ≈ 637m
How many cubic meters of water can the pool hold?
637 & # 178; × 3.14 = about 1274114.66m3

How many cubic meters of soil is needed to dig a cuboid pool, which is 35 meters long, 25 meters wide and 3 meters deep? If the walls and the ground are plastered with cement, plaster with cement
How many square meters is the area,

Need to dig 35 * 25 * 3 = 2625 (M3)
Cement needs to be plastered 35 * 25 + 35 * 3 * 2 + 25 * 3 * 2 = 875 + 210 + 150 = 1235 (M2)

A reservoir is 8 meters long, 5 meters wide and 3 meters deep. ① how large is the area of the reservoir? ② how large is the area of cement plastered on the bottom and around the reservoir? ③ how many liters of water can the reservoir store at most?