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Sphere on a square

  1. Apr 27, 2015 #1
    If I have a square surface of 25 m^2 and I want to know how many sphere of radius r will cover 50% of the area, then how to proceed ?

    Should I calculate the area of circle which will form by projecting a sphere on a 2D surface, and divide 12.5 m^2 by this area to get the no. of spheres ?
     
  2. jcsd
  3. Apr 27, 2015 #2

    HallsofIvy

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    If by "covering" you mean the sphere is directly above the area "covered" then, yes. A sphere of radius r "covers" a circle of radius r so area [itex]\pi r^2[/itex].
     
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