Hello, I am wondering if someone can explain the attached question '(b)'. I understand to calculate angle difference of sausages I can do 30*90/60 to find scale factor between 2015 and 2019 and find the amount of sausages for 90° but why should I multiply by (4/3)^2 to get a sum of 80 sausages? I am slightly concerned as there is no radius information attached to interpret.