Mandy works construction. Shes knows that a 5 meter long metal bar has a mass of 40 kg.Mandy wants to figure out the mass (w) of a bar made out of the same metal that is 3 meters long and the same thickness.


Which proportion could Mandy use to model this situation?

A40/3=w/5

b.5/3=40/w


Solve the proportion to determine the mass of the shorter bar