Question 463649
If L is the length of the rectangle and H is the height of the rectangle then 
L = 12 + 2*H

the perimeter of the rectangle is 
P = 2*L + 2*H
so 330 = 2*(12 + 2*H) + 2*H
   330 = 24 + 4*H + 2*H
   330 - 24 = 6*H
   306 = 6*H
    H = 51
So
    L = 12 + 2*51
    L = 12 + 102
    L = 114