What you need to do is add all of the pounds together so 34+68+14+19 take that answer and divide that by 9 which will get you 15 and that makes each bag 15 pounds
It would take the faucet 18 hours to fill the tank because 18/12=1.5. That means it will be 1.5 times slower to fill the tank up with the hose on. 1.5*12=18.