Answer:
3 inches by 12 inches
Step-by-step explanation:
Length = L
Width = W
LW = 36
L = 36/W
2(L + W) = 30
2(36/W + W) = 30
36/W + W = 15
36 + W² = 15W
W² - 15W + 36 = 0
(W - 3) (W - 12) = 0
W = 3 or W = 12
Therefore the dimension is 3 inches and 12 inches.
