Question

In a row there are $25$ houses each house has $17$ windows each window $4$ panes and each pane measures $1\frac{1}{2}$ dm by $\frac{3}{4}$ dm, what is the cost of glazing all these windows at Rs. $6$ per${\text{m}}^2$?

Answer 1

Total number of windows in 25 houses
$=25\times 17=425$
Area of panes in each window
$=(4\times \frac{3}{2}\times \frac{3}{4})d{m}^2$
$=\frac{9}{2}d{m}^2$
$\therefore$ Total area for glazing the windows
$=425\times \frac{9}{2}d{m}^2$
Total cost $=Rs.6\times 425\times \frac{9}{2}\times \frac{1}{100}$
$=Rs114.75$