A machine takes 1 minute to fill 6 cartons of eggs. At this rate, how long will it take to fill 420 cartons?
It would take 70 minutes to fill 420 cartons of eggs.
Let's use ratios for this problem.
1 minute to fill 6 cartons of eggs can be displayed as a ratio:
To find out how long it would take to fill 420 cartons, we must divide 420 by 6.
If we multiply each side of our ratio by 70, we'll have our final answer: