$\"\"$

The find out length:

Area of the rectangle is $\"\"$ where l is the length and w is the width.

$\"\"$ (Substitute A = 270 and w = 15)

$\"\"$ (Divide each side by 15)

$\"\"$ (Cancel common terms)

$\"\"$ cm (Divide: $\"\"$ ) \ \ $\"\"$

The length of the rectangle $\"\"$ cm.