Question

A height of 0.81m of a column of liquid (x) exerts the same pressure as a heavy box of weight 68,040N the base area of the box is 10m^2 what is the density of liquid (x)

Answer 1

$$P_1=P_2$$

$$g\rho h=\frac{W}{A}$$

$$\rho =\frac{W}{ghA}$$

$$\rho =\rm\frac{68\:040\:N}{9.8\: N/kg*0.81\: m*10\: m^2}=857\:\rm kg/m^2$$