How Do You Calculate the Mass of an Asymmetrical Ruler in Equilibrium?

[Jedijawad]

Homework Statement

Suppose the ruler in procedure 3 is asymmetrical, balancing at the 60.2 cm mark. The ruler is now supported at the 41.3 cm mark, and a mass of 364 g is placed at the 26.2 cm mark. Find the mass of the ruler. The ruler is 1.00 m long.

Homework Equations

Torque=τ=rFSinθ

The Attempt at a Solution

 

[haruspex]

What are the forces acting on the ruler? How large is each and what is its torque about the balance point (discriminating clockwise from anticlockwise)?