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Hydraulic lifts?

So this seems relatively easy but here it goes anyways.
In a hydraulic system, the left piston has a diameter of 4.5cm and a mass of 1.7 kg. The right piston has a diameter of 12cm and a mass of 3.2 kg. If the density of the fluid is 750 km/m^3, what is the height difference ‘h’ between the two pistons.

The larger piston exerts a pressure of

3.2kg/(π(12/2)²)cm² = 0.028kg/cm²

The smaller piston exerts a pressure of
1.7kg/(π(4.5/2)²cm² = 0.106kg/cm²

The difference in pressures is 0.078kg/cm²

In order for the system to be in equilibrium, the pressures at the same elevation must be equal. Therefore the difference in pressures is made up of the depth of the fluid.

ρ = 750kg/m³ (not 750km/m³) = .000750kg/cm³

.078kg/cm²/.000750kg/cm³ = 104.8 cm

KONE Hydraulic Elevators at JCPenney, Queens Center, Elmhurst, NY

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