Flow, Related Rates, Geometry, Caclulus, Control Volumes, Volume, Rate, Unit Conversions
GIVEN: A rectangular tub is being filled with the drain open.
PROBLEM: The tub begins empty. More water is entering the tub than draining from it.
If 1 gallon/minute is flowing into the tub, and 0.5 gallons/minute are flowing from the tub;
FIND: How long will it take to fill the tub to a depth of 1 ft? 1.5 ft?