← ProportionalityPool with two inlets and one drainProportionalityPracticeMediumYour answersecondsminuteshoursdaysweekshours + minutesminutes + secondsEnter the number. You can pick another unit from the list.Check answerReveal solutionStuck? Show me one stepRelated exercisesSimilarZAP 2011, Exercise 8 — Swimming pool filling with two pipesHarderWord Problems 009 — Two painters working togetherProportionality 028 — The forgotten bath plug