Hi!
length = width + 2 m
Perimeter = 2 * length + 2 * width =
= 2 * (width + 2) + 2 * width =
= 2 * width + 4 + 2 * width =
= 4 * width + 4 = 28
4 * width = 28 - 4 = 24
width = 24/4 = 6
length = width + 2 = 6 + 2 = 8
Area = length * width = 6 * 8 = 48 squared meters
Hope this helps!