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 uses 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 area of 400 mm2 and measured a volume of 16 cm3, Charles's vessel had an area of 10 cm2 and measured 0.4 dm3, and Wenceslas's vessel had a bottom area of 0.2 dm2 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?
At what height from the bottom was the water level after the rain a) Jan, b) Charles, c) Wenceslas?
Correct answer:

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