Question 1038384
Understand this type of question with THIS lesson:
<a href="https://www.algebra.com/my/FIND-RECTANGLE-DIMENSIONS-USING-GIVEN-PERIMETER-AND-AREA.lesson?content_action=show_dev">Finding dimensions of a rectangle with given perimeter and area</a>


Why the lesson instead of showing a solution to your specific example?  This is a very common exercise question type.