A four-story hotel. Rooms on the third and fourth floors. Over 40 rooms. Solar energy is used to make hot water. There is an elevator. The hotel and kitchen are on the first and second floors. How man

A four-story hotel. Rooms on the third and fourth floors. Over 40 rooms. Solar energy is used to make hot water. There is an elevator. The hotel and kitchen are on the first and second floors. How many cables and copper wires do you need? Thank you. A four-story hotel. Rooms on the third and fourth floors. Over 40 rooms. Solar energy is used to make hot water. Hotels and kitchens with elevators on the second floor need copper cables. After some calculation and analysis, the bus can use 50 square copper cables. The floor loop can use 35 square meters of copper cable. Each room can use 25 square meters of copper cable.