1. The problem statement, all variables and given/known data What is directly given in the problem: Converging lens with f=1.43m Hi = 2m 2. Relevant equations Hi/Ho = di/do M = Hi/Ho = di/do 1/f = 1/do + 1/di 3. The attempt at a solution Ho = 2m * 20 = 40m Not sure how I can get do from this. All of the equations seem to need di.