The perimeter (P) of rectangle is 240 feet.

Let x be the length (l) of rectangle.

The width (w) of rectangle is 10 feet shorter than the length and its expression $\"\"$ .

The formula for perimeter of rectangle $\"\"$ .

$\"\"$

Apply distributive property: $\"\"$ .

$\"\"$

Add 20 to each side.

$\"\"$

Divide each side by 4.

$\"\"$

The length of rectangle is 65 feet.

The width of rectangle $\"\"$ feet.

The dimensions of rectangle is 65 feet and 55 feet.