n identical cubes each of amss m an side I are on the horizontal surface. Then the minimum amount of work done to arrange then one on the ther is

n identical cubes each of amss m an side I are on the horizontal surfa

1.	n identical cubes each of amss m an side I are on the horizontal surface. Then the minimum amount of work done to arrange then one on the ther is
Answer» nmmgl `(MGLN^(2))/2` `(mgln(n-1))/2` `(mgln(n+1))/2` ANSWER :C