Working separately two bakers can make two wedding cakes in eight hours. working at the same rate, how many wedding cakes can three bakers make in forty hours

cake made by one baker in 8 hours = 2

cake made by one baker in 1 hour = 2/8 = 1/4

this is the work per hour per worker

as per the question,

total number of hours = 40

total number of workers = 3

Now,  cake made by one baker in 1 hour = 1/4

cake made by one baker in 40 hours = (1/4)*40 = 10

cake made by 3 bakers in 40 hours = 3* 10 = 30

so , total cakes made = 30