Question

Carpet sells for $4 per square foot and will cost you $720 to recarpet your rectangular room. If your room is 15 feet long, how many feet wide is it?

Answer 1

Given:

total cost= $720

length=15 feet.

cost of per square feet=$4

let width of room is= x

then area of room is:

`\begin{gathered} \text{Area}=\text{length}*\text{width} \\ \text{Area}=15* x \\ =15x \end{gathered}`

if the cost is $4 per square feet then total cost in room is:

`\begin{gathered} \cos t=4*15x \\ =60x \end{gathered}`

the given total cost is $720 then width of room is:

`\begin{gathered} 60x=720 \\ x=(720)/(60) \\ x=12 \end{gathered}`

so width of room is 12 feet.