A metre rule is found to balance at the 54cm mark when a body of mass 80g is suspended at the 20cm mark ,the balance point is said to be at 55cm mark. Calculate the mass of the ruler and the distance of the balance point from the zero end,if the body were moved to the 15cm mark.

Answer 1

I do not understand. If the cg of stick is at 54 it does not move up to 55 when you add mass at 20.
Please check for typos.

Answer 2

The question is calculate the meter ruler of weight 2N is found to balance at 50cm mark. Find its new turning point when a body of mass 250g is suspended at the 5cm mark