Question

The perimeter of a rectangular garden is $30$ feet. If its length is $6$ feet, what is its width?

• A. $9$ feet
• B. $10$ feet
• C. $18$feet
• D. $21$feet
• E. $24$feet

Answer 1

Answer: (A)

$9$ feet

The perimeter of a shape is the distance around it. In particular, the perimeter of a rectangle is given by the formula $P=2W+2L$. Substitute the correct values of the variables into this formula ($P=30$ and $L=6$) and then solve for the width W:
$30=2W+2\left(6\right)$
$30=2W+12$
$18=2W$
$W=9$
Therefore, the width of the garden is $9$ feet.