There are five units i.e. 1, 2, 3, 4 and 5. Each unit has a different height. Also, each unit contains books and boxes. unit2 is above unit1 and unit3 is above unit2 and so on. Every unit belongs to different country i.e. Beijing, Paris, London, Sydney, and Zurich. The total height of all five units is equal to 252”ft.
*Total Height of Unit is equal to the total height of books plus the total height of boxes in each unit. *Height of books is not equal to the height of boxes. Unless specified so.
The books belong to London is an even unit. The total height of unit1 is 75”ft. Sydney is not a unit1. The total height of the unit, which belongs to Sydney is 55”ft. There is only one gap between London and Paris. The height of books and height of boxes in unit3 are equal. The height of books in unit2 is not less than 30”ft. The books are in unit4 is four more than books, which is in unit3. The total height of London is not 37”ft. The total height of unit, which contains 37”ft is not taking a place, which is immediately above the unit, which contains 20”ft more than the unit, which belongs to Sydney. The height of boxes in unit2 is 23”ft. Unit belongs to Zurich does not contain the equal height of books and boxes. The total height of unit2 is an odd number and height is more than 50”ft and less than 55”ft. Unit1 contains 23”ft height of boxes more than unit4 contains height of boxes and unit5 contains 7”ft height of books less than unit1 contains.