Question

How many square metres of glass will be required for a window which has $6$ panes, each measuring $25cm\times 14cm$.

Answer 1

Finding the area of $1$ pane

$$\begin{gathered} Areaof1pane=length\times breadth \\ Areaof1pane=25\times 14=600c{m}^2 \end{gathered}$$

Now, the area of $6$ pane = $600\times 6=3600c{m}^2$

Converting it into $m^2$.

We know $1m^2=10000c{m}^2$

$$\begin{gathered} \because 1c{m}^2=\frac{1}{10000}{m}^2 \\ \therefore 3600c{m}^2=\frac{3600}{10000}=0.36m^2 \end{gathered}$$

Hence, the total glass required for the window will be $0.36m^2$.