A vessel in the shape of a circular solid is being filled with liquid that is flowing at a constant rate. The contribution deals with the relations between the shape of filled solid and course of function that describes the dependence of height of liquidlevel on the time. (en)
Es wird ein Problem betrachtet, das zur Illustration von Grundbegriffen der Differentialrechnung, zur Motivierung und zur Entwicklung funktionalen Denkens dienen kann.