Answer:
10cm
Explanation:
From the question, we're told that the aquarium is rectangular and the volume of a rectangular figure is can be found by using the below formula;
[tex]V=l\ast w\ast h[/tex]
where V = volume = 2400 cm^3
l = length = 20cm
w = width = 12cm
h = height = unknown
Let's go ahead and subsitute the given values into our equation and solve for h;
[tex]\begin{gathered} 2400=20\ast12\ast h \\ 2400=240h \\ \frac{2400}{240}=\frac{240h}{240} \\ 10=h \\ \therefore h=10\operatorname{cm} \end{gathered}[/tex]
So the height is 10cm
