"288 tiles" does he need to cover the floor.
Explanation:
Given,
The length of the floor (l) = 9 feet = 9 × 12 inches = 108 inches and
The breadth of the floor (b) = 8 feet = 8 × 12 inches = 96 inches
To find, the total number of tiles = ?
∴ The area of the floor = The length of the floor (l) × The breadth of the floor (b)
= 108 inches × 96 inches
Also,
The area of tiles = 6 inches × 6 inches
∴ The total number of tiles
= 3 × 96
= 288
∴ The total number of tiles = 288
Thus, "288 tiles" does he need to cover the floor.