Question

How many tiles, square in the shape of side $16cm$, will be required to pave a rectangle of dimensions $6.4m\times 5m$?

Answer 1

Calculate the area of rectangle:

Area of rectangular floor$=6.4m\times 5m=32m^2$

$1cm=0.01m$

Area of square tile$=16cm\times 16cm=16\times 0.01m\times 16\times 0.01m$

$=0.0256m^2$

Number of square tiles required$=\frac{Areaoffloor}{Areaoftile}$

$$\begin{gathered} =\frac{32}{0.0256} \\ =\frac{32}{256\times {10}^{-4}} \\ =1250 \end{gathered}$$

Hence, $\mathbf{1250}$ square tiles are required to pave the floor.