If the building has 5 floors how many rooms are there in the whole building?

To determine the total number of rooms in a building with 5 floors, we need to know how many rooms are on each floor. If, for example, each floor has 10 rooms, then the total number of rooms would be 5 floors multiplied by 10 rooms per floor, resulting in 50 rooms. Without knowing the number of rooms per floor, we can't provide an exact total.