Question

The pressure exerted by a water column of height $40cm$ is same as that exerted by $30cm$ column of an unknown liquid. What is the density of liquid?

Answer 1

Let the density of the unknown liquid be p

$0.4\times 1000\times g=0.3\times p\times g$

$p=400/0.3$

$p=1333.333kg/m^3$

We get, $p=1333.333kg/m^3.$