Twenty identical cubical blocks each of mass 100 gm and of side 10cm are lying on a horizontal surface. Work done in piling them one above the other is, (g = 10ms^(-2))

Twenty identical cubical blocks each of mass 100 gm and of side 10cm a

1.	Twenty identical cubical blocks each of mass 100 gm and of side 10cm are lying on a horizontal surface. Work done in piling them one above the other is, (g = 10ms^(-2))
Answer» `20 J` `2 J` `19 J` `10 J` Answer :C