Question

If 18 binders bind 900 books in 10 days how many binders will be required to bind 660 book in day

Answer 1

Assuming day refers to one day:

18 binders bind 900 books in 10 days.

This implies they bind 90 books in a day.

Therefore one binder binds 90/18 or 5 books in a day.(They are slow!)

To get 660 books binded in a day we need 660/5 or 132 workers.

Answer 2

no of binders          no of book bind            no of days

18                                  900                                  10

x                                     600                                   12