Answered

how many tiles 2dm on a side are needed to cover a floor 2.8m by 1.6m?

Sagot :

A.  Convert 2 dm to m.
     2 dm × 0.1 m/dm  = 0.2 m

B.  Area of a tile = (0.2 m)²
                        = 0,04 m²

C.  Floor Area = (2.8 m) (1.6 m)
                     = 4.48 m²

D.  Divide the floor area by the tile area:
     No. of tiles needed = 4.48 m²
                                    0.04 m²
     
    No. of tiles needed = 112 units