The project includes $100 \mathrm{~m}^{2}$ of solar panels that will be installed in the parking lots, producing electrical energy and providing shade for cars. On the pediatric hospital approximately $300 \mathrm{~m}^{2}$ of panels will be placed, with $100 \mathrm{~m}^{2}$ to generate electrical energy used on campus, and $200 \mathrm{~m}^{2}$ for thermal energy generation, producing water heating used in the hospital's boilers. Suppose that each square meter of solar panel for electrical energy generates a savings of 1 kWh per day and each square meter producing thermal energy allows saving $0.7 \mathrm{~kWh}$ per day for the university. In a second phase of the project, the area covered by solar panels that generate electrical energy will be increased by 75\%. In this phase, the coverage area with panels for thermal energy generation should also be expanded. To obtain double the amount of energy saved daily, compared to the first phase, the total area of panels that generate thermal energy, in square meters, should have a value closest to (A) 231. (B) 431. (C) 472. (D) 523. (E) 672.
The project includes $100 \mathrm{~m}^{2}$ of solar panels that will be installed in the parking lots, producing electrical energy and providing shade for cars. On the pediatric hospital approximately $300 \mathrm{~m}^{2}$ of panels will be placed, with $100 \mathrm{~m}^{2}$ to generate electrical energy used on campus, and $200 \mathrm{~m}^{2}$ for thermal energy generation, producing water heating used in the hospital's boilers.
Suppose that each square meter of solar panel for electrical energy generates a savings of 1 kWh per day and each square meter producing thermal energy allows saving $0.7 \mathrm{~kWh}$ per day for the university. In a second phase of the project, the area covered by solar panels that generate electrical energy will be increased by 75\%. In this phase, the coverage area with panels for thermal energy generation should also be expanded.
To obtain double the amount of energy saved daily, compared to the first phase, the total area of panels that generate thermal energy, in square meters, should have a value closest to\\
(A) 231.\\
(B) 431.\\
(C) 472.\\
(D) 523.\\
(E) 672.