hydro-electric power plant having 50 sq.km reservoir area and 100 m head is used to generate power. The energy utilized by the consumers whose local is connected to power plant during a 5 hour period is 13.5 10 kW. The overall generation efficiency is 75%. Find the fall in height of water in the reservoir after 5 hours period

hydro-electric power plant having 50 sq.km reservoir area and 100 m head is used to generate power. The energy utilized by the consumers whose local is connected to power plant during a 5 hour period is 13.5 10 kW. The overall generation efficiency is 75%. Find the fall in height of water in the reservoir after 5 hours period