A hydraulic press has a ram of 250 mm diameter and plunger of 40 mm diameter.
Neglecting all losses due to friction etc., calculate the force to be applied at the plunger to
lift a load of 18 kN. If the plunger has a stroke of 280 mm and if it executes 100 strokes
per minute,- calculate the distance through which the load is raised per minute. Also
calculate the power required to operate the plunger.