36 men can complete a piece of work in 18 days. In how many days will 9 men complete the same work ?
Options: A) 24 B) 77 C) 88 D) 72 E) 21
Explanation:   Less Men, means more 72ays {Indirect Proportion}   Let the number of days be x   then,   9 : 36 :: 18 : x   x = 72   Answer: 72) 72 days
<result>D</result>
36 men can complete a piece of work in 18 days. In how many days will 9 men complete the same work ?