Perimeter of the base of the ruler multiplied by its height
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Simply work out the area of a section of cable.........
The answer depends on the cross-sectional area of the timber.
To convert linear meters to kilograms, you need to know the material's density and the cross-sectional area. First, calculate the volume by multiplying the length (in meters) by the cross-sectional area (in square meters). Then, multiply the volume by the material's density (in kilograms per cubic meter) to obtain the mass in kilograms. The formula is: mass (kg) = length (m) × area (m²) × density (kg/m³).
Volume = cross sectional area * lengthArea = 2* cross sectional area + perimeter of cross section * length
You cannot. The whole point in describing it as a water column is that it is a body of water that is 2 metres high - WHATEVER the size of its cross sectional area.