How much electrical energy can be produced in a year by a conventional electrical power plant of 100 MW if the power plant functioned 80% of the time (the rest being spent on maintenance). If one...

How much electrical energy can be produced in a year by a conventional electrical power plant of 100 MW if the power plant functioned 80% of the time (the rest being spent on maintenance).

If one small solar power plant with average W = 0.15 MWh/m2 per year is going to be built to replace that conventional electrical power plant, calculate how much area in km2 that needed?