# An experiment

The three friends agreed to the experiment. At the same time, they all took out an empty cylindrical container on the windowsill and placed it so that it was horizontal. Everyone lives in a different village, and each used a container with a different bottom diameter. When they met the next day after the rain, they shared the results of their experiment. Jan's vessel had a bottom content of 400 mm

At what height from the bottom was the water level after the rain a) Jan, b) Charles, c) Wenceslas?

^{2}and measured a volume of 16 cm^{3}, Charles's vessel had an area of 10 cm^{2}and measured 0.4 dm^{3}, and Wenceslas's vessel had a bottom area of 0.2 dm^{2}and measured 0.4 l of water.At what height from the bottom was the water level after the rain a) Jan, b) Charles, c) Wenceslas?

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