If 9 men do a work in 80 days, in how many days will 20 men do it? Answers:
A) 18 days
B) 36 days
C) 42 days
D) 48 days
E) 44 days
9 * 80 = 20 * x   x = 36 days   ANSWER:36 days
<result>B</result>
If 9 men do a work in 80 days, in how many days will 20 men do it?