Question

the formula for finding the area of a rectangle is A=LWSolve this formula for LL=______if the length of a rectangle is 18 feet qnd the width is 9 inches. what is the area of the rectangle in units of square feet? _______ ft^2

Answer 1

1) Dividing the given formula by W we get:

`\begin{gathered} (A)/(W)=(LW)/(W), \\ (A)/(W)=L. \end{gathered}`

2) We know that:

`1in=(1)/(12)ft.`

Therefore:

`9in=9*(1)/(12)ft=(3)/(4)ft.`

Then:

`W=(3)/(4)ft.`

Substituting W=3/4ft and L=18ft in the given formula we get:

`A=(18ft)((3)/(4)ft)=13.5ft^2`

Answer:

1)

`L=(A)/(W).`

2)

`13.5ft^2.`