Question

You borrow bookcases to display 943 books. You plan to put 22 books on each shelf. There are 5 shelves. How many bookcases do you need

Answer 1

9 bookcases.

Explanation:

Total number of books = 943

Total number of books placed in one shelf = 22

Total number of shelves in one bookcase = 5

Total number of books displayed in one bookcase =
`No.\ of\ shelves\ in\ 1\ bookcase*\ No.\ of\ books\ in\ each\ shelf`

Total number of books displayed in one bookcase=
`5* 22=110`

Total number of bookcase required =
`(total\ no.\ of\ books)/(Number\ of\ books\ displayed\ in\ 1\ bookcase)`

Total number of bookcase required =
`(943)/(110) =8(63)/(110)`

So, 880 books can be displayed in 8 bookcases. and for the remaining 63 books we also require one more bookcase. Therefore, the total number of bookcases needed are 9.