Situations involving area
Area is used in real life situations associated with carrying out a task.
Question
The wall of a room is to be painted. However there is a door and a window in the wall. The painter needs to estimate how much paint she will need to paint the wall while leaving out the door and window.
To do this she has to calculate the area of the part to be painted. A sketch indicating the measurements of the wall is shown.
The door measures \(1.9m\) by \(0.9m\).
The window measures \(2.3m\) by \(1.8m\).
What is the area that is to be painted?
\(Area\, of\, whole\, wall = 6.7 \times 2.6 = 17.42m^{2}\)
\(Area\, of\, door = 1.9 \times 0.9 = 1.71m^{2}\)
\(Area\, of\, window = 4.14m^{2}\)
\(Area\,to\,be\,painted\,=17.42–1.71–4.14\)
\(=11.57m^{2}\)
