Question

Ana works at the library she has 72 books to put on the shelves each shelf can hold 7 books ana estimates that she will need 10 shelves for all the books

Answer 1

11 shelves are needed

Explanation:

Given that:

Number of books to put on shelf = 72

Number of books per shelf = 7

Number of shelves required for all books :

Total number of books / number of books per shelf

= 72 / 7

= 10. 285

Since, only 7 books can be put on a shelf, then with 10 shelves, there will be 2 books left, hence 1 more shelf will be needed.

11 shelves are needed