A fish tank, filled with water, is 100cm long,60cm wide and 40cm high. It is tilted resting on a 60cm edge, with the water level reaching C, the midpoint of AB. Find the depth of water in the fish tank once AB is returned to a horizontal position.

The depth of water in the fish tank once AB is returned to a horizontal position is; 20 cm
We are given the dimensions of the tank as;
Length = 100 cm
Width = 60 cm
Height = 40 cm
Now, the tank has been tilted and the water level is now at point c which is the mid point of AB. Thus;
V_new = (60 * 40 * (100/2))/3
V_new = 120000 cm³
Now, when the tank is returned to a horizontal position, the depth will be gotten from;
lwh = 120000
100 * 60 * h = 120000
h = 120000/6000
h = 20 cm
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