First the difference between the perimeter and area is that area is the amount of space inside a shape, and perimeter is the distance around the shape
^thats what they measure
And since perimeter is a length or distance, the unit of measure is inches, feet, yards, or miles. The area is usually found by doing l x w
Hope this helped
The Length of the box is 17 inches
Hope it helps
The answer is 6x if you simplify the equation
40% of 200 is 80 so 120 were sold at the door