## Task 2 - 320712

Kathrin's aquarium has the shape of an open-top rectangular prism. It is $80 \mathrm{~cm}$ long, $40 \mathrm{~cm}$ wide, and 42 $\mathrm{cm}$ high. The water level is $7 \mathrm{~cm}$ from the top edge.

Investigate whether it is possible to add 10 liters of water to this aquarium without it overflowing!
In the aquarium, above the water level, there is still space for a cuboid with a length of $80 \mathrm{~cm}$, a width of $40 \mathrm{~cm}$, and a height of $7 \mathrm{~cm}$, thus with a volume of $80 \cdot 40 \cdot 7 \mathrm{~cm}^{3}=22400 \mathrm{~cm}^{3}=22.41$.

Since this is more than 10 liters, one can pour 10 liters into the aquarium without it overflowing.