Given: Length of rectangular field = 32 cm Breadth of rectangular field = 20 cm Length of tile = 4 cm Formula Used: Area of square = side × side Area of rectangle = length × breadth Calculations: Length of rectangular field =32cm Breadth of rectangular field =20cm Length of tile =40cm ⇒ Area of rectangular field =(32×20)=640cm2 Area of each tile =(4×4)=16cm2 ⇒ Number of tiles =(640/16)=40 ∴ The number of square tiles used to cover the rectangular field is 40.