Observe the vessels A, B, C, and D as shown in the figure carefully.
The volume of water taken in each vessel is as shown. Arrange them in the order of decreasing pressure at the base of each vessel. Explain."
Pressure at depth due to the liquid column depends upon gravitational acceleration $(g)$, the density of the liquid, and the height of the liquid. Here, $g$ and density are the same, so the only thing that can change pressure is height.
So, the order of pressure exerted by the fluids $A,\ B,\ C,$ and $D$ at the base is given by
$P_D$ > $P_B$> $P_A$ > $P_C$
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