Home Blog When Is The Tank Half Full? Blog When Is The Tank Half Full? By Lily - 3 August, 2020 ShareTweetThe amount of water flowing into a tank doubles every minute. The tank is full in an hour. When was the tank half full? What is your answer? 30 minutes 60 minutes 59 minutes ResultsVote Scroll down for the answer A N S W E R Facebook Comments ShareTweetREADHidden Object: Can You Find The Basketball's?