Question

40 percent of Andrea's living room floor is covered by a carpet that is 4 feet by 9 feet.What is the area of her living room floor ?

• A. $80f{t}^2$
• B. $75f{t}^2$
• C. $60f{t}^2$
• D. $90f{t}^2$

Answer 1

Answer: (D)

$90f{t}^2$

${90}^{o}f{t}^2$: The area of the carpet is equal to $I\times w$, or $4\times 9=36f{t}^2$. Set up a proportion to find the area of the whole living room floor:

$\frac{40}{100}=\frac{36}{x}$ Cross-multiply to solve.

$40x=36000$

$x=90f{t}^2$