L + W + L + W = 340 yards (the perimeter) 2L + 2W = 340 L + W = 340/2 = 170. Substitute L = W + 50. (W + 50) + W = 170 2W = 170 - 50 = 120 W = 120/2 = 60. Answer. The dimensions are 60 yd (width) and 60 + 50 = 110 yd (length).