P = 2(L + W)
P = 48
48 = 2(L + W)
48/2 = L + W
24 = L +W
24 - L = W
A = L * W
A = 135
135 = L(24 - L)
135 = 24L - L^2
L^2 - 24L + 135 = 0
(L - 9)(L - 15) = 0
L - 9 = 0 24 - L = W
L = 9 24 - 9 = W
15 = W
L - 15 = 0 24 - L = W
L = 15 24 - 15 = W
9 = W
the dimensions : either the length is 9 cm and the width is 15 cm.....or the length is 15 cm and the width is 9 cm.