Convert 25 cm to meters:
25 cm x 1 meter = 0.25 so, 0.25 m x 0.25 = 0.0625 square meter per tile
100 cm
Let x = number of tiles needed
50 sq. meters = 0.0625 sq. meters (x)
50 sq. meters = 0.0625 sq. meters (x)
0.0625 sq.m. 0.0625 sq . m
800 = x
800 tiles are needed to cover the entire floor of the rectangular room