They could look at the weight(take into consideration if the book is paperback or hardcover), the length, and the size of the font to estimate the size of the book.
30,816 books would go into 1,284 containers which would weigh 15,408kg with all the books in them or 2,568kg with the books not in them.
21
1 glass holds 1/6 of a bottle then 6 glasses hold 1 glass bottle water.
so, 1 bottle can give 6 glasses of water
then
3
(
1
2
)
or
7
2
bottle can give
6
⋅
7
2
glasses of water , that is 21 glasses.
Answer link
Answer:
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Step-by-step explanation: