1. The problem statement, all variables and given/known data Water in a cylinder of heigth 10 ft and radius 4 ft is to be pumped out. Find the work required if the tank is full of water and the water must be pumped to a height 5 ft above the top of the tank 2. Relevant equations 3. The attempt at a solution I tried to slice this cylinder horizontally, so I get: Force of gravity on slice = 62.4 * 16 * phi * delta h Work done of slice = Force of gravity * distance I am confused on what is the distance here, is it 5?