Answer:

26910

Step-by-step explanation:

Area of floor = 5.85 x 6.90 m^2 = 585 x 690 cm^2

If side of a square is 15 then area of square tile = 15x15

no. of tiles = 585 x 690/15x15 = 1794

or if area of square is 15 then

585 x 690/15 = 2610 tiles