Area of a rectangle = Length & Width = 16 sq.ft. Take factors of 16 = 1, 2, 4, 8, 16 The combinations will be 1, 16 and 2, 8. (4 can't be taken as it would be a square). The width is supposed to be more than 1 foot. In that case the option is only to take the combination of 2 and 8.