The answer is A. You just need to add 117,000 + 71,500= 184,500. Is this answer fine?
A rectangle, presumably, as the cross section is going to be whatever shape the outward faces are (in the case of a vertical cross section like this one)
Answer:
24 books.
Step-by-step explanation:
The number of books that that can be fitted into the shelf is equal to the width of the self divided by the width of each book:

I believe the answer is A. Plane