I don't do this kind of math every day, so maybe I'm wrong, but didn't you just convert a width of 3.048 meters to a volume of 3.048 meters³? A cube with sides of length 3.048 actually has a volume of 28.317m³. On top of that, density is measured in kg / m³, so do your conversions before division...
So my own calculation: Mass: 15000.00 lbs = 6803.89kg Volume: 1000ft³ = 28.317m³ (our cube is 3m by 3m by 3m)
Density = Mass / Volume = 240.28 kg / m³ So in fact water is 4 times as dense.
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On top of that, density is measured in kg / m³, so do your conversions before division...
So my own calculation:
Mass: 15000.00 lbs = 6803.89kg
Volume: 1000ft³ = 28.317m³ (our cube is 3m by 3m by 3m)
Density = Mass / Volume = 240.28 kg / m³
So in fact water is 4 times as dense.
I realized my mistake, this is what I get for doing math late at night