text: math question, show all steps please :)? it takes 24 minutes to completely fill my bathtub and only 8 minutes to drain a full tub. how long will it take to empty a full tub if the water is left on? in one minute the filling tap fills 1/24 of the tub in one minute the emptying tap empties=1/8 of the tub net emptying per minute=1/8-1/24 =3/24-1/24=2/24=1/12 of the tub time taken to empty with both thetaps on=12 min