If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
Correct: B
The rate at which the machines produce widgets is constant. Since 5 machines can make 5 widgets in 5 minutes, this means that each machine can make 1 widget in 5 minutes. If we have 100 machines, they can make 100 widgets in the same amount of time it takes 5 machines to make 5 widgets because the production rate per machine does not change. Thus, it would still take 5 minutes for 100 machines to make 100 widgets.