Connect with a knowledgeable community and get your questions answered on IDNLearn.com. Find in-depth and accurate answers to all your questions from our knowledgeable and dedicated community members.

At a dairy plant, a milk tank can be filled in 4 hours using the in-valve. Using the out-valve, the tank can be emptied in 8 hours. If both valves are open and milk is being pumped into the tank, how long will it take to fill the tank?