Literally you just have to take the numbers and multiply by two. So like for #1 do 29 x 2 and then find that answer and then on a separate line write 6 x 2 and then when u have answers to those equations add them up and get ur final answer which should be 70
First you should set up fractions equal to each other to see the size ratio
8/34 = x/1.2
As to make comparable fractions. Then you would cross multiply in order to get Divide both sides by 34 and you should get an answer of 0.28m for the model beam.