Explanation:
First, calculate the area of the first floor:
Area of the first floor = Length x Width = 12 feet x 10 feet = 120 square feet.
Now, calculate the number of tiles needed for the first floor, which you've stated is 65 tiles.
Next, calculate the area of the second floor:
Area of the second floor = Length x Width = 20 feet x 15 feet = 300 square feet.
Now, use the ratio of areas to find out how many tiles are needed for the second floor:
(Number of tiles needed for the second floor) = (Area of the second floor / Area of the first floor) x (Number of tiles needed for the first floor)
(Number of tiles needed for the second floor) = (300 square feet / 120 square feet) x 65 tiles
(Number of tiles needed for the second floor) = (2.5) x 65 tiles
Number of tiles needed for the second floor = 162.5 tiles.
Since you can't have half a tile, you'll need to round up to the nearest whole tile. Therefore, you will need 163 tiles for a floor that is 20 feet by 15 feet.