Question

ze space below the questo8. Each of the 10 floors in the largebuildings has 8 windows on the front andon the back and 4 windows on each ofthe 2 sides. A cleaning contractor willwash the windows for $6 each. What isthe cost of washing all the windows inthe 22 large buildings?

Answer 1

Step 1

Find the number of windows on each floor

In a large building, there are 10 floors, each floor has the following;

$\begin{gathered} 8\text{ windows }in\text{ the front} \\ 8\text{ windows in the back} \\ 4\text{ windows on the side to the right} \\ \text{and} \\ 4\text{ windows to the side on the left} \\ \text{Therefore, each floor has 24 windows} \end{gathered}$

Step 2

Find the number of windows in a large building

$\begin{gathered} \text{There are 10 floors,} \\ \text{Number of windows in each large building = 10 }\times24\text{ = 240 windows} \end{gathered}$

Step 3

Find the cost the cleaning contractor will take to clean the windows in each building.

$\text{\ }6\text{ }\times240\text{ = \ }1440$

Step 4

Find the cost of cleaning all the windows in 22 large buildings

$22\times\text{ \ }1440=\text{ \ }31,680$

Hence, the cost of washing all windows in the 22 large buildings = $31,680