Question

Mrs. Jones wants to paint a wall but not the door on the wall how many square feet of wall does Mrs johnes need to paint ?

Answer 1

The area of the wall that needs to be painted is the total area, including the door, subtracted by the area of the door. The total area is given by:

$\text{total}=\text{length}\cdot\text{height}$

Applying the values provided by the problem, we have:

$\text{total}=10\cdot15=150ft^2$

We need to calculate the area of the door now.

$\text{door}=3\cdot7=21ft^2$

Now we can calculate the area to be painted, the area of the wall.

$\text{wall}=150-21=129ft^2$

Mrs. Johnes need to paint 129 square feet of the wall.