20 binders can bind 1400 books in 21 days. How many binders will be required to bind 1600 books in 20 days?
Answers:
A) 24
B) 18
C) 17
D) 16
E) 10

Rationale: "binders books days 20 1400 21 x 1600 20 x / 20 = ( 1600 / 1400 ) * ( 21 / 20 ) = > x = 24 answer : a"
Answer: A