If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
Correct: A
The rate at which the machines work is the key. If 5 machines can make 5 widgets in 5 minutes, this means that each machine can make 1 widget in 5 minutes. Therefore, 100 machines can make 100 widgets in the same amount of time it takes for 1 machine to make 1 widget, which is 5 minutes.