Question 1017317
If the rectangle is roped off, that's the perimeter.  The perimeter is twice the length plus twice the width.  You're already given the length as 65.  
P = 2L + 2W
200 = 2(65) + 2W
200 = 130 + 2W
70 = 2W
35 = W
Now you have both the length and the width.  Multiply the length by the width to get the area.
65 * 35 = 2275 sq m