Study the information carefully and answer the question given below. There are three floors in a building: floor 2 is above floor 1, and floor 3 is ab...

Study the information carefully and answer the question given below.
There are three floors in a building: floor 2 is above floor 1, and floor 3 is above floor 2. Each floor has three flats: Flat A is to the west of Flat B, which is to the west of Flat C. Each flat on every floor has an area of 2520 ft² and a distinct number of rooms (no two flats have the same number of rooms). The area of each room in one of the flats on an odd-numbered floor is 280 ft². The floor with 9 rooms is below the floor where each room has an area of 360 ft². The area of each room in Flat A on the 3rd floor is 350 ft² more than the area of each room in the flat with 9 rooms. The total number of rooms on the 2nd floor across all flats is 15. The number of rooms in Flat C on the 2nd floor is more than in Flat A on the 2nd floor but less than in Flat B on the 2nd floor. The flat where each room has an area of 420 ft² is to the west of the flat where each room has an area of 252 ft². There is exactly one floor between the floor with 2 rooms and the floor where each room has an area of 630 ft², but both are in the same flat. The flat where each room has an area of 504 ft² is on an even-numbered floor. The floor where each room has an area of 315 ft² is immediately below the floor with 5 rooms.
What is the area of each room in Flat B on the 3rd floor?