How much coffee do I use to make coffee in the 55 cup urn? How long does it take to brew the full urn?

55 cup Coffeemaker:
Water Level--------Strong--------Mild
-------------------------------------------------------
55 cups-------------5 cups---------3 1/2 cups
45 cups-------------4 cups---------2 2/3 cups
35 cups-------------3 1/4 cups----2 cups
25 cups-------------2 1/4 cups----1 1/4 cups

Do not make less than 25 or more than 55 cups of coffee at one time.

I did 24 cups in 22 minutes. 55 cup Coffeemaker: Water Level--------Strong--------Mild ------------------------------------------------------- 55 cups-------------5 cups---------3 1/2 cups 45 cups-------------4 cups---------2 2/3 cups 35 cups-------------3 1/4 cups----2 cups 25 cups-------------2 1/4 cups----1 1/4 cups Do not make less than 25 or more than 55 cups of coffee at one time. I did 24 cups in 22 minutes.