36 men can complete a piece of work in 18 days. In how many days will 108 men complete the same work ? Choose the most appropriate option:
A) 24
B) 77
C) 6
D) 29
E) 21

Rationale: "explanation : less men , means more days { indirect proportion } let the number of days be x then , 108 : 36 : : 18 : x x = 6 answer : c ) 6 days"
Answer: C