Maths-
General
Easy

Question

The shortest distance between any two opposite edges of the tetrahedron formed by planes x+y=0,y+z=0,z+x=0,x+y+z=a is constant, equal to ___

  1. 2a    
  2. fraction numerator 2 a over denominator square root of 6 end fraction    
  3. fraction numerator a over denominator square root of 6 end fraction    
  4. fraction numerator 2 a over denominator square root of 3 end fraction    

The correct answer is: fraction numerator 2 a over denominator square root of 6 end fraction


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