Trying to resolve a volume calculation

  • #1
narrator
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Hi all, I've made errors in my calculations and need help.

I'm trying to calculate the volume of a layer above sea level to the height of Flight Level 300 i.e. 30,000 feet. Next, I want to subtract the volume of land within that layer. Here are my calculations.
Purely for the sake of my calculations, I'll treat the earth as a perfect sphere, and I'll round 30,000feet to 10,000m.

1. The radius of the sphere of earth at sea level is approx 6,378,000m. That would make its volume approximately 1.08675x10^21 cu.m.

2. From the height of FL300 (30,000ft) or (rounded) 10,000m the radius increases to about 6,388,000m. The total volume of the larger sphere would be 1.09187x10^21cu.m

3. Subtracting one from the other leaves the volume of the layer at about 5.12x10^18cu.m.

4. There is no landmass above FL30. I've googled the total volume of all land masses within that layer (i.e. above sea level) and the only answer I can find (in 3 places) is 1 trillion cu.km or around 1x10^21cu.m. If this is true, then my calculations are badly wrong.

I would love your help with this? And thank you in advance.
 
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  • #2
narrator said:
I've googled the total volume of all land masses within that layer (i.e. above sea level) and the only answer I can find (in 3 places) is 1 trillion cu.km or around 1x10^21cu.m.
I find a different estimate, 125,109,600 km3, here.
 
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  • #3
Hill said:
I find a different estimate, 125,109,600 km3, here.
Thanks for that. I found the Wiki article that your link refers to. Excellent! Much appreciated!
 
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FAQ: Trying to resolve a volume calculation

1. How do I calculate the volume of a rectangular prism?

To calculate the volume of a rectangular prism, you multiply its length (l), width (w), and height (h) together. The formula is: Volume = l × w × h.

2. What is the formula for the volume of a cylinder?

The volume of a cylinder is calculated using the formula: Volume = π × r² × h, where r is the radius of the base and h is the height of the cylinder.

3. How do I find the volume of an irregularly shaped object?

The volume of an irregularly shaped object can be found using the water displacement method. Submerge the object in a graduated cylinder filled with water and measure the change in water level. The difference in volume is the volume of the object.

4. What units are typically used for volume calculations?

Volume is typically measured in cubic units, such as cubic centimeters (cm³), cubic meters (m³), or liters (L). The choice of unit depends on the scale of the object being measured.

5. Can I calculate the volume of a cone, and if so, how?

Yes, you can calculate the volume of a cone using the formula: Volume = (1/3) × π × r² × h, where r is the radius of the base and h is the height of the cone.

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