We can find the perimeter of a rectangle by means of the formula:

Where a and b are the length of the sides of the rectangle
To find the area of the rectangle, we can use the formula:

Then for each rectangle, we have:
First rectangle, sides: 5ft and 12.5 ft
-Perimeter:

Then, the perimeter of the first rectangle equals 35 feet
-Area:

Then, the area of the rectangle equals 62.5 ft^2
Second rectangle, sides: 15m and 8.2m
-Perimeter:

Then, the perimeter of the rectangle equals 46.4 m
-Area:

Then, the area of this rectangle equals 123 m^2