• Question: how many liters does it take to fill the earth?

    Asked by antman to Christie, Dan, David, Dawn, Sian on 15 Jun 2016.
    • Photo: David Robertson

      David Robertson answered on 15 Jun 2016:

      All you need to work this out is some simple maths 🙂
      The volume of a sphere is 4/3 pi r^3
      The earth has a radius (r in the equation) of 6.4*10^6m (6.4 million metres)
      so its volume is roughly 1*10^21 m^3 (cubic metres)
      There are 1000 litres in a cubic metre, so the volume of the earth is roughly
      1*10^24 litres

    • Photo: Christie Waddington

      Christie Waddington answered on 15 Jun 2016:

      Can’t do better than David’s answer on this one! Spot on!

    • Photo: Dan Lewis

      Dan Lewis answered on 15 Jun 2016:

      David has nailed this answer!

    • Photo: Dawn Lau

      Dawn Lau answered on 15 Jun 2016:

      David has a perfect answer! According to Wikipedia, that’s a septillion litres.

    • Photo: Sian Thomas

      Sian Thomas answered on 15 Jun 2016:

      Well done David!

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