Answer:
900,000 books
Explanation:
book is a three dimensional object there you need to find the ratio of the container to the book. ( units must be the same)
Vcontainer=length*width*height
Vcontainer=2400cm*900cm*800cm
Vcontainer=1,728,000,000cm^3
Vbook=length*width*height
Vbook=20cm*16cm*6cm
Vbook=1920cm^3
no books =Vcontainer/Vbook
no books =1,728,000,000cm^3/1920cm^3
no books=900,000 books