Mathematical question

Discussion in 'Off-Topic Discussion' started by pete, Feb 3, 2022.

  1. pete

    pete Growing a bit of this and a bit of that....

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  2. Selleri

    Selleri Koala

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    Ah- it could come in useful when estimating a thin coverage, such as painting a wall. 1m3 is 1000 litres (about three bathtubfuls), so if one has a very big wall to paint they can calculate how many m3s of paint they need to freshen up their mansion's decor.

    In gardening world applications could be for things such as grass seed or fertiliser, but it would need instructions how thick the application needs to be e.g. 1 litre/ 1m2. If your plot is 100mx 100m, that's 1000 m2 so as per the guidance, you'd need 1m3 seed.

    M3 sounds less familiar than litres and is not easy to picture.
     
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    • pete

      pete Growing a bit of this and a bit of that....

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      There is a pattern to it, but it still doesn't make sense to me.

      1 m3 = 1m2
      8 m3 = 4m2
      27m3 = 9m2
       
    • NigelJ

      NigelJ Total Gardener

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      Me as well: as the numbers don't really make sense lhs column 1m^3 = 1m^2, 2m^3 = 1.5874 m^2 so increasing volume decreases surface coverage, no don't work like that. Also convertion should be conversion (admit pedantry by me)
      m^3/m = m^2 so volume in cubic meters divided by thickness in m = surface area covered in square meters.
      This web site has it right m3 to m2 - Converter Cubic Meters to Square Meters - online
       
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      • clanless

        clanless Total Gardener

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        Doesn't this all depend on what space/time dimension you are in...:scratch:
         
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        • clanless

          clanless Total Gardener

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          If I was to guess = 1m3 volume = 6m2 surface area.
           
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          • pete

            pete Growing a bit of this and a bit of that....

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            Sounds like star trek to me.:biggrin:

            I thought that was what I was looking at at first Nigel, but its not, I cant work out what way it is converting.
             
          • pete

            pete Growing a bit of this and a bit of that....

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            I think you might have it there @clanless

            On second thoughts, not so sure as one cubic meter = one square meter.
             
          • Michael Hewett

            Michael Hewett Total Gardener

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            Wouldn't it depend on how thickly or thinly you spread whatever it was
             
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            • clanless

              clanless Total Gardener

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              This doesn't make sense to me either. 1m3 can be any shape - of any surface area and thickness - so how can this calculation work without a known surface area? Even then, you would have to assume that the shape is a square or rectangle. The 1m3 could be shaped like a sphere.

              It's not 1st April is it?
               
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              • Jocko

                Jocko Guided by my better half.

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                Perhaps the converter is giving the surface area of a cubic metre in square meters.
                Convert the original question back to pre metric is like saying how many gallons in a square foot!
                 
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                • pete

                  pete Growing a bit of this and a bit of that....

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                  I'm looking again and wondering if the square measurement is the footprint of a cube the size stated in the cubic measurement.
                   
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                  • gks

                    gks Total Gardener

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                  • pete

                    pete Growing a bit of this and a bit of that....

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                  • pete

                    pete Growing a bit of this and a bit of that....

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                    Yeah, I've just worked it backwards and the square measurement is the area of one face of a cube that is the cubic measurement.
                     
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