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The diameter of the bottom of a cylindrical pool is 8 decimeters, and the depth of the pool is 2 meters. If cement is applied on the bottom and around, how many square meters is the area of cement? Step by step!
Radius = 8 △ 2 = 4 decimeters = 0.4 meters
Area = 0.4 × 0.4 × 3.14 + 0.8 × 3.14 × 2 = 5.5264 M2
It is a cylindrical pool. The diameter of the bottom is 20m and the depth is 2m. 1. Cement the side and bottom of the pool. What is the area of the cement part?
(1) Put cement on the side and bottom of it. What's the area of the cement part?
(2) How many tons of water can the pool hold at most? (1 ton per cubic meter of water)
Radius = 10m
Height = 1m
Plastering area
=Side area + bottom area
=3.14×20×2+3.14×10²
=439.6 square meters
Water filling
=Volume × 1
=（3.14×10²×2）×1
=628 tons
There is a cylindrical pool with a diameter of 20m and a depth of 2m. (1) a layer of cement should be applied to the side and bottom of the pool. How many square meters is the area of the cement surface?
(2) How many cubic meters of soil need to be excavated to rebuild the pool to a depth of 3M (the diameter remains unchanged)?
Determinant
Bottom area: 3.14 * 10 * 10 = 314 (M2)
Side area: 3.14 * 20 * 2 = 125.6 (M2)
Area of cement surface: 314 + 125.6 = 439.6 (M2)
3.14 * 10 * 10 * (3-2) = 314 (M3) -- soil to be excavated
The diameter of the bottom surface of a cylindrical pool is 2m. Now we need to plaster cement on the inner wall and bottom surface of the pool to calculate the cement area
3.14×（2÷2）²+3.14×2×2
=3.14×1+3.14×4
=3.14+12.56
=15.7（m²）
A: the cement area is 15.7m
Thank you
Build a cylindrical pool with a bottom diameter of 2.5 meters and a depth of 3 meters. Plaster cement around and on the bottom of the pool. What is the area of plastering cement in square meters?
The side area of the pool: 3.14 × 2.5 × 3 = 23.55 (M2); the bottom area of the pool: 3.14 × (2.5 △ 2) 2, = 3.14 × 1.252, = 3.14 × 1.5625, = 4.90625 (M2); the area of plastering cement: 23.55 + 4.90625 ≈ 28.5 (M2); answer: the area of plastering cement is 28.5 m2
Build a cylindrical reservoir with a bottom circumference of 12.56 m and a depth of 1 m. plaster cement around and on the bottom. If 6 kg cement is used per square meter,
How many kilos of cement do you need?
Bottom perimeter = 3.14 × diameter, bottom perimeter = 12M, diameter = 4m, radius: 2m, cement around and on the bottom = bottom area + side area, bottom area = 3.14 × R & sup2; r = 2m, bottom area = 12.56m & sup2; side area = bottom perimeter × high side area = 12.56m & sup2; total kg of cement: (12.56 +...)
The diameter of the bottom of a cylindrical pool is 8 meters and the depth of the pool is 2 meters. If cement is applied on the bottom and around the pool, how many square meters is the area covered with cement? How many cubic meters of water can the pool hold at most?
The area of cement coating is: 3.14 × 8 × 2 + 3.14 × (8 △ 2) 2 = 50.24 + 50.24, = 100.48 (M2). The water tank can hold water: 3.14 × 8 × 2, = 50.24 × 2, = 100.48 (M3). A: the area of cement coating is 100.48 m2, and the water tank can hold water of 100.48 m3
The diameter of the bottom of a cylindrical pool is 10 meters, and the depth of the pool is 3 meters. If the bottom and surrounding of the pool are coated with cement, how many square meters is the area covered with cement?
How many cubic meters of water can the pool hold after repair?
Area 3.14 × 10 / 2 × 10 / 2 + 3.14 × 10 × 3
=3.14×25+3.14×30
=172.7 square meters
Volume 3.14 × 10 / 2 × 10 / 2 × 3 = 3.14 × 75 = 235.5m3
The diameter of the bottom of a cylindrical pool is 8 meters and the depth of the pool is 2 meters. If cement is applied on the bottom and around the pool, how many square meters is the area covered with cement? How many cubic meters of water can the pool hold at most?
The area of cement coating is: 3.14 × 8 × 2 + 3.14 × (8 △ 2) 2 = 50.24 + 50.24, = 100.48 (M2). The water tank can hold water: 3.14 × 8 × 2, = 50.24 × 2, = 100.48 (M3). A: the area of cement coating is 100.48 m2, and the water tank can hold water of 100.48 m3
A cylindrical pool has a bottom diameter of 8m and a pool depth of 2m. If cement is applied to the bottom and around the pool, what is the area of cement?
Side area = 3.14 * 8 * 2 = 50.24
Bottom area = 3.14 * 4 * 4 = 50.24
Area of plastering cement = side area + bottom area = 50.24 + 50.24 = 100.48
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