Answer :
Let W be the width and L be the length:
2W + 2L = 14
W + L = 7
(W,L) = (1,6), (2,5), (3,4), (4,3), (5,2), (6,1)
2W + 2L = 14
W + L = 7
(W,L) = (1,6), (2,5), (3,4), (4,3), (5,2), (6,1)