Extracted text: The problems: 1. A pump is used to raised water to a reservoir through 1000 m. Iong of 20 cm diameter with Cw of Hazen-William's Equation equal to 100. If the pipe is to be replaced with a new one having the same length but with a diameter of 25 cm and Cw = 120, determine the power save if the flow is to be maintained at 75 liters per second. Draw the approximate EGL and HGL.