Question

The paint in a container is sufficient to paint an area equal to $18.72m^2$. How many tiles of dimension $24cm\times 18cm\times 12cm$ can be painted by this paint?

Answer 1

Total surface area of each titles $=2(lb+bh+hl)$

$\begin{array}{c}=2\left(24\times 18+18\times 12+12\times 24\right)c{m}^2\\ =1872c{m}^2\end{array}$

No. of tiles $=\frac{18.72m^2}{1872c{m}^2}$

$\begin{array}{c}=\frac{18.72\times {10}^{4}c{m}^2}{1872c{m}^2}\\ =100\end{array}$