Question

a tile is size by 9 by 9 the number of tiles needes to cover a 12ft wide and 18ft long floor will be​

Answer 1

1 tile = 9 cm

Area of 1 tile = 9 × 9 = 81 cm²

Area of area that it has to cover = 12 ft × 18 ft

1 ft = 12 cm

Area of area to cover in cm = 12 × 12 × 18 × 12

= 31104 cm²

No. of tiles = 31104 / 81 = 384

So 384 tiles are needed to cover the floor