A small hydroelectric power plant was built to back up other sources of electricity that supplied the needs of a town that consumed 5,1100 kW. One day, the plant that received power from the other sources suffered a breakdown and the city began to receive power only from power only from this small hydroelectric power plant. The reservoir of this plant contained 600,000 tons of water whose center of mass was 25 meters above the generator, the reference level. level. The generator had an efciency of 36% in transforming mechanical energy into electrical energy. Considering that the acceleration of gravity is 10 "\"52, for how long was this plant able to guarantee was able to guarantee the regular supply of this city? a) 3.0 h b) 2.0 h c) 4,0 h d) 2.5 h e) 3.5 h