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

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

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