Question

The bedroom is 17 feet long by 18 feet wide, and the ceiling is 9 feet high.

Answer 1

Answer: 615 ft²

Step-by-step explanation:

There are 4 walls - assume that the floor and ceiling are not being painted.

2 walls are 17 ft by 9 ft ⇒ 2(17)(9) = 306 ft²

The other 2 walls are 18 ft by 9 ft ⇒ 2(18)(9) = 324 ft²

1 window is 3.75 ft by 4 ft ⇒ 1(3.75)(4) = 15 ft²

2 walls + other 2 walls - 1 window ⇒ 306 + 324 - 15 = 615 ft²

Answer 2

Answer:

The total area that must be paintedis 615ft^2

Step-by-step explanation:

Here we need to calculate the total surface of the room that will be painted, this would be:

The 4 inner walls.

Minus the area of the window, that will not be painted.

I also assume that the floor and the ceiling will not be painted.

the dimensions of the room are:

17 feet long.

18 feet wide.

9 feet high.

So we will have:

two walls of 17 feet by 9 feet.

two walls of 18 feet by 9 feet.

Then the total surface of the walls is:

S = 2*(17ft*9ft) + 2*(18ft*9ft) = 630 ft^2

And the window is 3 feet 9 inches bt 4 feet.

first, we have that 1 feet = 12 inches.

then 9 inches is equivalent to:

9/12 feet = 0.75 feet.

So the area of the window is:

W = 3.75ft*4ft = 15ft^2

the difference is:

A = 630ft^2 - 15ft^2 = 615ft^2