Answer:
m = 56.5 kg
Explanation:
Since the addition of mass on one piston caused a change in pressure head at the other. Diameter of the piston calculated is used as 0.46 m
Δm*g / Area = p * g * Δh ..... Eq1
[tex]m = \frac{p*h*A}{g}[/tex]
[tex]m = \frac{850 * 0.4 * pi*0.46^2}{4*9.81}\\\\m= 56.5 kg[/tex]