In chemistry, Isaac can mix the correct solution in 20 minutes. Together,
kaac and Newton can mix the same solution in 11 minutes. How long
does it take Newton to mix the solution when he is working alone?
11 minutes is the average, and we know isaac takes 20 minutes. so we should multiply 11 by 2, which gives us 22. subtract isaac's time (20), and you'll get 2
