If u have 180 books and the weight of the books is 30 kilograms then how much is each book
If u have 150 books whats the weight of each book now
If 180 books weigh 30 kg
then 1 book weighs 30/180 or 1/6 kg or appr 167 g
and 150 books would weigh 150(1/6) or 25 kg
(flimsy books)