Given:
Number of binders (B1) = 72
Number of books (N1) = 720
Number of days (D1) = 22
Number of books (N2) = 660
Number of days (D2) = 12
Formula Used:
Work = (Binders × Days) / Number of books
Solution:
work done for 1 book = (binders x days) / n.o of books=( 22 x72)/720
work done for 660 books in 12 days for (1 book work)= (binders x 12) /660
(binders x 12) /660=( 22 x72)/720
binders = 121
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