1. ​​a uniform metre scale is balanced at 60 cm mark , when weight of 5 gf and 40 gf are suspended at 10 cm mark and 80 cm mark respectively calulate the weight of the metre sacle 
2. a uniform metre scale is balanced at 20 cm  mrk when a weight of 100 gf is suspended from the end where must the weight be suspended calculate the weight of the metre sacle 
3. a uniform metre sacle balances horizontally on aknife edge placed mass of 25  g is supported from one end draw the diagram of the arrangement calculate mass of the scale .