A cylindrical sand pile has a bottom area of 28.26 square meters and a height of 2.5 meters. How many meters can a 10 meter wide road be paved with 2 cm thick sand?

2 cm = 0.02 M, volume of sand pile: 28.26 × 2.5 = 70.65 (M3); length of paveable Road: 70.65 △ 10 × 0.02 = 70.65 △ 0.2 = 353.25 (m). Answer: paveable Road: 353.25 M

A cone-shaped sand beach has a bottom area of 12.56 m and a height of 0.9 M. how many meters can be paved on a 10 m wide road with a thickness of 2 cm?

Radius = 12.56/3.14/2 = 2m
Volume = 2 * 2 * 3.14 * 0.9/3 = 3.768 M3
Length = 3.768 / (10 * 0.02) = 18.84m

A cylindrical sand pile has a bottom area of 28.26 square meters and a height of 2.5 meters. How many meters can a 10 meter wide road be paved with 2 cm thick sand?

2 cm = 0.02 M, volume of sand pile: 28.26 × 2.5 = 70.65 (M3); length of paveable Road: 70.65 △ 10 × 0.02 = 70.65 △ 0.2 = 353.25 (m). Answer: paveable Road: 353.25 M

A cone-shaped sand beach has a bottom area of 30 square meters and a height of 1.5 meters. How long can a 5 cm thick road surface be paved on a 10 m wide road with this pile of sand?

Sand pile volume = 1 / 3 × 30 × 1.5 = 15m3
5cm = 0.05m
Pavement length = 15 △ 10 △ 0.05 = 30m
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The bottom area of a cone-shaped sand pile is 28.26 m2, 5 m. how many meters can a 2 cm thick road surface be paved on a 10 m wide road with this pile of sand?

What's the volume of sand
28.26 × 2.5 × 1 / 3 = 23.55 (M3)
2 cm = 0.02 M
Can shop
23.55 ÷ (10 × 0.02) = 117.75 (m)

A cone-shaped sand and stone pile has a bottom area of 12.56 square meters and a height of 1.5 meters. If this pile of sand and stone is used to pave a road with a length of 10 meters and a width of 4 meters, how thick can it be paved

(12.56×1.5×1/3)÷(10×4)
=6.28÷40
=0.157 (m)
=15.7 (CM)
A: it is 15.7 cm thick

The perimeter of the bottom of a cone-shaped sand and stone pile is 12.56 meters and 2 meters. If the road is paved with these sand and stone, the width of the road is 10 meters and the thickness of the sand and stone is 2 cm, how many meters can it be paved?

v=1/3πr²h
=1/3*（12.56÷3.14÷2）²*3.14*1.2
=5.024m
2 cm equals 0.02 M
0.02 * 10 = 0.2 M2
5.024 △ 0.2 = 25.12m

A cone-shaped sand and stone pile, the perimeter of the bottom is 12.56 meters, 2 meters. If these sand and stone are used to pave the road, the road width is 10 meters, and the sand and stone thickness is 2 cm
How many meters can this pile of sand and stone cover?

The volume of sand and stone pile can be calculated to get 20.096m and 179; divide by the thickness to get the road surface area of 1004.8m2, and then divide by the road width to get 100.48m

A cone-shaped sand pile has a bottom area of 56.52 square meters and a height of 2 meters. How many meters can a 4 cm thick road be paved on a 12 meter wide road with this pile of sand?
Urgent need

Volume = 56.52 × 2 × 1 / 3 = 37.68 M3
Road length = 37.68 △ 12 △ 0.04 = 78.5m

(1) A cone-shaped sand pile, with a bottom area of 125.6 square meters, needs to be paved 4 cm thick on a 10 meter wide road. How long can it be paved?
(2) The volume of a cylinder and a cone is 60 cubic centimeters, so the volume of a cylinder is () cubic centimeters, and that of a cone is () cubic centimeters
(3) Stack three cylindrical boxes with the same height and bottom radius of 10 cm together. If you take away one box, the surface area will be reduced by 314 square cm. What is the volume of each box?
————————————————Dividing line——————————————
I'm a poor student!
Please clarify the height of question 3

1314m
V = 1 / 3 * 125.6 * 3 = 125.6m3
125.6 / 10 / 0.04 = 314m
2. The volume of a cylinder and a cone is 60 cubic centimeters, so the volume of a cylinder is (45) cubic centimeters and that of a cone is (15) cubic centimeters
The volume of a cone is 1 / 3 of that of a cylinder with equal base and height
31570 cm3
20*3.14*h=314 h=5
V = 10 * 10 * 3.14 * 5 = 1570 CC

A cylindrical sand pile has a bottom area of 28.26 square meters and a height of 2.5 meters. How many meters can a 10 meter wide road be paved with 2 cm thick sand?