1. The problem asks about the meaning of "tank is situated at height of 20 m from water level." 2. This means the bottom or base of the tank is located 20 meters above the water surface level, not the height of the tank itself. 3. The height of 20 m is the vertical distance the water must be lifted by the pump to reach the tank. 4. So, the tank could be any height, but its base is 20 m above the water level where the pump draws water. 5. This height is important because it affects the work done by the pump to lift the water against gravity.