18 men can complete a piece of work in 30 days. In how many days can 15 men complete that piece of work?	Options:
A) 23 days	B) 36 days	C) 22 days	D) 29 days	E) 20 days

Rationale: "b 36 days 18 * 30 = 15 * x = > x = 36 days"
Answer: B