A hydraulic jack with a plunger of 30 mm diameter has a stroke of 100 mm, and a ram of 300 mm diameter. A lever arrangement with a leverage of 10 is used to drive the plunger. If a weight of 5 kN is to be lifted, determine the force to be applied on the lever. Calculate the height to which the weight will be raised in 50 strokes, and the work done involved.