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?