A hydraulic press can lift 
when a mass ' 
' is placed on the smaller piston. It can lift 
when the diameter of the larger piston is increased by 4 times and that of the smaller piston is decreased by 4 times keeping the same mass ' 
' on the smaller piston.
Text Solution
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Atmospheric pressure 
will be acting on both the limbs of hydraulic lift.
Applying pascal's law for same liquid level
Diameter of piston on side of 
is increased by 4 times so new area 
Diameter of piston on side of 
is decreasing
(In order to increasing weight lifting capacity, diameter of smaller piston must be reduced)
Again, 
From equation 
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