![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
A wheat bin is a cone on the top and a cylinder on the bottom. The diameter of the bottom of the cylinder is 3 m and the height of the cone is 0.6 M. if the weight of each cubic meter of wheat is 735 kg, the volume can be calculated, How many kilos does the wheat weigh? The number obtained keeps the whole number
The volume of wheat storage is as follows:
3.14×(3/2)^2×2+1/3×3.14×(3/2)^2×0.6
=3.14×1.5^2×(2+0.2)
=3.14×2.25×2.2
=15.543 (M3)
The weight of the wheat is about:
735 × 15.444 = 11424 (kg)
A: this store of wheat weighs about 11424 kg
A cone-shaped sand pile has a circumference of 31.4 m and a height of 1.5 m. how many meters can it be paved on a 125 m long and 10 cm thick road?
10 cm = 0.1 M; radius: 31.4 ／ 3.14 ／ 2 = 5 (m); volume of sand pile: 13 × 3.14 × 52 × 1.5, = 13 × 3.14 × 25 × 1.5, = 3.14 × 25 × 0.5, = 39.25 (M3); length to be paved: 39.25 ／ (125 × 0.1), = 39.25 ／ 12.5, = 3.14 (m); answer: it can be paved 3.14 m long
The perimeter of the bottom surface of a cone-shaped sand pile is 25.12m and the height is 3M. How far can it be paved with this pile of sand 3cm thick on a 4m wide road?
Wrong. It's 5cm thick. It's done in positive and negative proportion
The bottom radius is: 25.12 △ 3.14 △ 2 = 4m
It can be spread x meters
4²×3.14×3÷3=4×0.05×x
x=251.2
That is: 251.2m can be paved
The perimeter of the bottom surface of a cone-shaped sand pile is 25.12m. If the sand pile is laid on a section of road, the width of the road is 4m, and the thickness of the sand is 4m. How many meters can it be laid?
Don't use letters
The thickness of sand is 0.5m
L = 2 π R, l = 25.12, so r = 4, v = 1 / 3 π r square * H = 16.7467, l = V / (4 * 0.05) = 83.7333
A pile of cone-shaped sand pile, the perimeter of the bottom is 25.12m, and the height is 3M?
L = 2 π R, l = 25.12, so r = 4
The square of V = 1 / 3 π R * H = 16.7467
l=V/（4*0.05）=83.7333
A cone-shaped sand pile has a perimeter of 18.84m at the bottom and a height of 2.5m. How long can a 3cm thick inner pavement be paved on a 5m wide road with this pile of sand?
Ground radius = 18.84 / 2 / 3.14 = 3M
Cone volume = 3 * 3 * 3.14 * 2.5/3 = 23.55m3
23.55 / 5 / 0.03 = 157 M
It can cover 157 meters
The perimeter of the bottom surface of a cone-shaped sand pile is 25.12m, and the height is 1.5m. If the weight of each cubic meter of sand is 1.7t, the sand pile is larger than the perimeter of the bottom surface of a cone-shaped sand pile
The perimeter of the bottom surface of a cone-shaped sand pile is 25.12m, and the height is 1.5m. If the weight of each cubic meter of sand is 1.7t, how much is the weight of this pile of sand?
c=2πr
25.12=2*3.14*r
r=4
v=1/3*πr^2*h
=1/3*3.14*4^2*1.5
=25.12
25.12 * 1.7 = 42.704 tons
A cone-shaped sand pile has a perimeter of 6.28 meters at the bottom and a height of 0.6 meters. How many meters long can a 2 cm thick road be paved on a 4 meter wide road with this pile of sand?
2 cm = 0.02 M. volume of sand pile: 13 × 3.14 × (6.28 △ 3.14 △ 2) 2 × 0.6, = 13 × 3.14 × 1 × 0.6, = 3.14 × 0.2, = 0.628 (cubic meter); length of paved road: 0.628 × (4 × 0.02), = 0.628 × 0.08, = 7.85 (meter); answer: can pave 7.85 meters
The circumference of the bottom surface of a cone-shaped sand pile is 25.12m, and the height is 3M. If the weight of each cubic meter of sand is 1.7t, how much T is the weight of the pile? (the number obtained is kept as an integer.)
Bottom radius = 25.12 △ 3.14 △ 2 = 4 (m)
Bottom area = 4 & # 178; × 3.14 = 50.24 (M & # 178;)
Sand pile volume = = 50.24 × 3 △ 3 = 50.24 (m # 179;)
Sand pile weight: 50.24 × 1.7 ≈ 85 (T)
The bottom area of a cone-shaped sand pile is 25.12m. If the weight of each cubic meter of sand is 1.7t, how much is the weight of the pile? (the number is kept in integer)
Bottom area × height = cylinder volume
Cylinder volume = three times the cone volume
So:
25.12 × 3 × 1 / 3 = 25.12 (M3) - volume of conical sand pile
1.7 × 25.12 = 42.704 = 43 (tons)
A
RELATED INFORMATIONS
- 1. The perimeter of the bottom surface of a cone-shaped sand pile is 25.12m and the height is 1.5m. If the weight of each cubic meter of sand is 1.7t, how much is the weight of the pile? (the number is reserved to one decimal place)
- 2. A conical sand pile with a bottom area of 12.56 and a height of 0.9 meters. How thick can this pile of sand be laid into a sand pit with a length of 4.5 meters and a width of 2 meters?
- 3. A cone-shaped sand pile has a bottom circumference of 12.56m and a weight of 1.5 tons per cubic meter of sand. How many tons of sand is this pile? fast
- 4. A cylindrical pool is 2m deep and the perimeter of the bottom is 6.28m. A layer of cement is required to be plastered around and on the bottom of the pool. How many square meters is the area of plastering cement
- 5. 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!
- 6. A new cylindrical pool was dug in the orchard. The inner wall and bottom of the pool should be plastered with cement. The diameter of the bottom of the pool is 5 meters, and the depth of the pool is 1.5 meters. What is the area of plastering cement Give me the answer by 10:30. It's due tomorrow
- 7. A cuboid reservoir is 20 meters long, 12 meters wide and 1.5 meters deep. How many square meters does the reservoir cover? If a tree is planted every 1 meter around the reservoir, at least how many trees should be planted?
- 8. A reservoir is 30 m long, 15 m wide and 2 m deep. If water of 1.5 m depth is injected into the reservoir, how many cubic meters of water are needed? Please help me, great Xia ~ ~ list the formula ~ ~ ~ thank you ~ ~ ~ it's urgent~~~
- 9. 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?
- 10. 1. If the solution set of inequality 3 / 1 (x-m) > 2x-m is x < 2, then M=_____ 2. When x takes what value, the value of algebraic formula 2-2x is not less than the value of 3 [X-2 (x-1)]
- 11. There is a cone on the top and a cylinder below. The circumference of the bottom of the cylinder is 9.42 meters and 2 meters high. The height of the cone is 0.6 meters. If 600 kg per cubic meter, it's not enough How many tons can this store hold
- 12. A cuboid swimming pool is 20 meters long, 18 meters wide and 2.5 meters deep. If the walls and bottom are plastered with cement, how many square meters is the area plastered with cement You have to be right
- 13. Hope primary school to build a swimming pool, 50 meters long, 3 meters wide, 2 meters deep. 1 at the bottom of the swimming pool and the inner wall of a layer of cement daub cement area 2. Draw a water line with white paint 1.5 meters high along the inner wall of the swimming pool. How long is the water line 3. How many cubic meters of water are stored in the swimming pool according to the water level Hope primary school to build a swimming pool, 50 meters long, 35 meters wide, 2 meters deep. 1 at the bottom of the swimming pool and the inner wall of a layer of cement daub cement area
- 14. A granary full of rice is 0.9m high, with a cone on the top and a cylinder on the bottom. The perimeter of the bottom is 12.56m, and the height of the cylinder is 0.5m 1. How much rice can this granary hold? 2. If the weight of rice is 500kg per cubic meter, how many tons of rice can this granary hold?
- 15. Dig a cuboid reservoir, 15 meters long, 8 meters wide and 2.5 meters deep. How many cubic meters can this reservoir store at most?
- 16. A reservoir. The depth of the reservoir is 3.5 meters. There is 2 meters of water in it. The volume of water is 18 cubic meters. How many square meters is the bottom area of the reservoir M, what's the volume of the reservoir?
- 17. A swimming pool with a length of 100m and a width of 60m, with an average depth of 2m, needs to be excavated
- 18. If tiles are placed at the bottom and around the swimming pool, what is the area of tiles [length 100m, width 60m, average depth 2m] It's urgent to calculate,
- 19. A swimming pool is 50 meters long, 25 meters wide and 2 meters deep. How many tiles are needed to paste 4 square decimeters of tiles on the four walls and bottom of the swimming pool?
- 20. A new swimming pool will be built in the gymnasium. The length, width and depth of the swimming pool are 50 meters, 20 meters and 2.5 meters respectively How many square meters of ceramic tile?