Question

How many square tiles each with a side of 90 cm are needed to cover a square-shaped floor of side 900 cm

Answer 1

100 tiles

The side of square slab is =90 cm

∴ Area of square slab =a^2 =(90 cm)^2 =8100 cm^2

Area of the floor = 900 cm = a^2 =(900 cm)^2=810000 cm^2

Number of slabs that will cover the floor

⇒ Area of square slab÷Area of the ffloo =8100÷810000 =100 tiles