A metre rule is found to balance at the 35cm mark. when a body of mass 50kg is suspended at the 10cm mark, the balance point is found to be at 20cm mark find

Question

a)the Mass of the ruler.

Answer 1

Since the rule alone balances at the 35cm mark, rather than the 50cm mark, it clearly does not have uniform density. So, there's no way to tell how much of the mass lies past the 20cm mark.