A water pump is used to fill a swimming pool in the penthouse on the top floor of the Burj Khalifa, the worlds tallest building with a height of 828 m. The water at the inlet of the pump is at atmospheric pressure (101 kPa) and 30 C. Due to the high altitude of the Burj Khalifa, the pressure at the outlet is reduced to 91 kPa. The pump must deliver water from ground level to the penthouse at a rate of 10 kg/s. What is the power required to do this (in kW)?