0.8cm iron plate, more than one square meter

0.8cm iron plate, more than one square meter

Mass = density * Volume
=Density * thickness * length * width
Pay attention to the unit conversion of length and weight in actual calculation
m=7.8g/cm^3 * 0.8cm * 1m^2
=7.8 * 0.8 * 10,000 g
=62,400 g
=62.4 kg

A cone-shaped sand pile has a bottom area of 12.56 square meters and a height of 1.5 meters. It can be used to pave 2 cm thick road surface on a 10 meter wide road for several meters

Volume = 12.56 × 1.5 × 1 / 3 = 6.28 M3
Length = 6.28 ﹣ 10 ﹣ 0.2 = 31.4m

A cone-shaped sand pile has a bottom area of 12.56 square meters and a height of 1.2 meters. How many meters can a 10 meter wide road be paved with 2 cm thick sand?

Sand pile volume = 12.56 × 1.2 △ 3 = 5.024 m3,
10 m wide, 2 cm thick (0.02 M thick), can pave 5.024 △ 10 △ 0.02 = 25.12 M
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A cone-shaped sand beach has a bottom area of 12.56 square meters and 2 meters. How many meters of road can be paved with 0.4 meters of sand on an 8 meter wide road?

Cone volume = 12.56 × 1.2 × 1 / 3
Road length = (12.56 × 1.2 × 1 / 3) / (8 × 0.4)
=1.57m

A cone-shaped sand beach has a bottom area of 12.56 square meters and a height of 12 meters. How many meters can a 2 cm thick road surface be paved with this pile of sand on a 12 meter wide road
Wrong. It's a 1.2m wide road. Remember!

12.56*12/(12*2)

A cone-shaped sand beach has a bottom area of 12.56 square meters and a height of 12 meters. How many meters can a 2 cm road be paved on a 10 meter wide road with this pile of sand?

The volume of sand is 1 / 3 × 12.56 × 12 = 50.24 cubic meters
The road is long
=50.24÷10÷0.02
=251.2m
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A cone-shaped sand beach, with a bottom area of 56.52 square meters and a height of 5 meters, can be used to pave a road of 2 cm on an 8-meter-wide road for how long

2 cm = 0.02 M
56.52 × 5 × 1 / 3 (8 × 0.02) = 588.75m

A cone-shaped sand pile, with a bottom area of 12.56 square meters and a height of 6 meters, can be paved several meters on a 10 meter wide road with 20 cm thick pavement
Use equations to solve simple equations

Set up the energy to lay x meters
X*10*0.2=12.56*6*1/3
2X=25.12
X=12.56
It can cover 12.56 meters

A cone-shaped sand beach with a bottom area of 25 square meters and 8 meters. How many meters can a 5 cm thick road surface be paved on an 88 meter wide road with this pile of sand

Volume 25 × 1.8 × 1 / 3 = 15m3
Five centimeters is 0.05 meters
15÷88÷0.05=3.41
A: it can cover 3.41 meters

A cone-shaped sand beach, with a bottom area of 15.7 square meters and a height of 1.2 meters, is used to pave a 2 cm thick road surface on a 10 meter wide road
How long can it last?

△ 2.7 × 28.6 M3
2 cm = 0.02 M
6.28 ﹣ 10 ﹣ 0.02 = 31.4 (m)
A: it can cover 31.4 meters