Question 969593
1350 sq yds.  ANSWER

Perimeter =2L +2W or 2(L+W)

150=2(L+W)  You don't need to divide by 2, but it makes the numbers smaller.
Divide by 2,
75=L+W

let length=x
width is (x/3)+15

x+(x/3)+15=75
Subtract 15 from both sides.
x+(x/3)=60

Multiply by 3 to clear the fractions.

3x +x =180
4x=180
Divide by 4

x=45
(x/3)=15
(x/3)+15=30

L=45  yards
W=30  yards
Perimeter =2(45)+2(30)=150
Area=L*W=45yds*30 yds=1350 sq yds.