Question

Gina wants to paint her bedroom which she measures to be 10ft x 6ft x 7ft (L x W xH). The paint she likes will cost $0.75 per square foot. How much will she spend topaint all four walls?

Answer 1

The total area of the four walls of her bedroom is given by:

`\begin{gathered} A=2\cdot L\cdot H+2\cdot W\cdot H \\ A=2\cdot10\cdot7+2\cdot6\cdot7 \\ A=224\text{ ft}^3 \end{gathered}`

Then, the total cost of the paint is given by:

`0.75\cdot A=0.75\cdot224=\text{\$}168`